I’ve been a live audio engineer for 40 years, there are 2 things that are needed no 1 bass players who are capable of playing defined notes and sound systems that are set up well . Most good hi fi speaker manufacturers get it right but the draw backs are you can’t get the extra octave that you need for the full audio spectrum, this is where the Rels come in all they do is make subs and boy do they get it right , so why would you not treat your self to one 😊

Your production values have reached the same exemplary level as your presentation. Kudos, in particular, for going so clearly through the connection options for those who may find them bewildering.

Thank you Tarun for the detailed review. I am currently investigating the t/9x and s/510 Rel subwoofers and have watched many reviews. You were the only reviewer who addressed and explained the knobs and switch on the back of the unit,crosser, gain and the phase switch. You have a wonderful ability to sound very knowledgeable, yet not overly”techy”. You give very practical knowledge to those of us in the hobby. Cheers

I treated myself to an 8", 65W M&K sub way back in the mid nineties. I was then living in a brick-internal-walled semi, very well soft furnished, and it added tremendous depth and atmosphere to my set up. Over the years I've moved 3 times and everything else has changed, but the M&K sub now graces my very own music room alongside Q Acoustics system 20s. Using a remote mains switch with a button next to my listening chair I can compare music with or without the sub in play, and the difference is still remarkable. Without it, the sound is thin and lacking body; with it the sound takes on a completeness that is overwhelmingly satisfying. Okay, the sub is getting on for 30 years old and, as you intimated, can be improved upon, but I reckon it was £450 well spent!

Thanks for the bass tracks! 👍 I started with a REL T-zero mkiii then jumped to the T/9X…just recently upped it to the S/510. Each upgrade was a tremendous improvement. REL’s are superlative.

Very helpful review. I recently bought the Rel T0 for my bedroom setup powered by the KEF LSX. I love it but I know I haven't quite got it dialled in properly yet. This video will help with the tweaking. Newish to the hobby and this channel. Yourself and Darko are helping me along

I appreciate all of your great, level headed reviews. I did locate my T7 in the corner as suggested and I do agree it might be a bit too boomy. I'm going to take your suggestion and see what a side wall might sound like, Thanks.

I just added the T5X to my Rega/ProAc set-up. I cannot believe the difference. I listen to a lot of jazz... the left hand on the piano and stand up bass have a weight and richness that were lacking. Really amazing.

I purchased a sub in 2008 and, for the past couple of years, as my listening skills have evolved, have thought it slow, ponderous and boomy; better for movies than music. Thank you for confirming the evolution in subs and changing my thoughts of what could be accomplished with a more musical one.

Thanks for the excellent review again. I have added T7x into my 2 channel with Harbeth and Hegel. Initially i was not convinced that sub is a must have component for a 2 channel system but after listening for few months now i am fully convinced that a sub is a necessary component for a 2 channel system considering the completeness it adds to the music.

My dad’s REL Strata 2 is still running my HT. It’s so good. And last forever. Lovely

Hi Tarun, excellent piece. I have been using a pair of G1s with my rockport aviors since 2016. It’s the single most impactful addition to my system in my view. It’s transformational.

I started my system with the TZero MKIII. It was amazing what a 6.5” woofer can do and how big it made the music. Since then I got a T7i and an S5 for home theater

I have a REL T5i and it is so simple to set up and optimize, and makes a big difference in whole system sound quality across dimensions as you said. Great company, most likely would never choose anything else.

Thanks Tarun great review. I have a subwoofer that we built ourselves and it sounds good. One of the best things we did was to integrate the subwoofer into my stereo system. This how I set mine up. My sub has a left and right high input so I connected that via speaker wire from each speaker. Firstly my speakers are bi-amped, I disconnected the top so it left the bottom end drivers playing, we then balance the volume of the sub with the other speakers so the sub did not dominate. we then played different tracks to set the crossover point and made sure the sub was not boomy. Then connected back the top end of the speakers and fiddled a little with the volume and crossover of the sub. Wow what a difference, it has enhanced both the bottom end and the mid range has also improved.

I never thought I would ever add a subwoofer to my system. I added a pair of T/5X’s to my current small system and I was completely blown away by the results. The depth ,width and over soundstage they added was game changing for me. Would never live without a Rel product now.

I run a stereo pair of REL T5/X and the best comparison I can come up with is that the difference with and without them is like an iced versus an un-iced cake. Thanks for the content and review!

Hi Tarun. I have had Rel T7 and currently own the T5. I believe subwoofer integration is fun and have played around quite a lot with placement and the dial in. The T7 excited room modes more and so was harder to work with in my case. I am very happy with my current T5 that seems to work better with my room. I could never live without my sub. I tend to adjust the gain depending on what time of day I listen to music and what type of music I listen to. Great video

Thanks sooooooo much for the Sub-Woofer tuning music…your choices were THE BEST!!!

Very sensible, well explained and honest review. Thank You. I bought a REL T9X and it's surprisingly easy to integrate giving very tight and forceful bass. I placed it right next to the left speaker as a corner was not practical in my room. A great track IMO in addition to this mentioned to test subwoofer Integration is the Ennio Morricone composition "Come Maddelena" from the movie" Maddelena" which a solid repetitive bass drumline that helps set up, coupled with multiple complex percussion and vocals

I just added a pair of T7X's to a pair of Maggie 3.7i's. Just took an already amazing speaker to another level.

I added a T7X to my SF Lumina III, and it made a huge difference for me. I love my SF; however I felt them lacking in bass. The TX7 (1 unit) was seemless - I get the feeling the sound is coming from the SF. I must also mention - I find myself making adjustments to gain and the crossover from time to time. I would not hesitate in recommending the REL T7X. I love my sub and intend to keep it as long as Tarun has kept his REL :).

I still run an old RELStrata 3 in my 2 channel system. Still does the job! You are correct I bought one with black finish for £600 over 20 years ago

45K! Congratulations! I had talked myself out of a sub woofer but this video and the comments have got me talking to myself again 😉 unfortunately or fortunately the present room size simply rules out such an addition (dumb joke - won’t know where to put the larger soundstage either). But certainly something to look forward to if I move to a bigger place. From the comments too, this seems to be a no-brainer upgrade. Never thought so many audiophiles could agree on something 🤣

Being a bass player has helped me integrating subwoofers, usually using two smaller subs, a very in depth review tarun,.

I have a Rel T5x . The best upgrade I have ever made to my system. It just fills that low end gap perfectly, and gives you flexibility when listening to many genres of music. The set up is time consuming, but great fun and well worth the effort. Will never have to change my main speakers ever again

I purchased my first sub in 1980. It was a Swedish product called Audio Pro B250 to match with my LS3-5As. 20 years later I retired the Rogers for a more full range speaker, Symphonic Line Legatos but I always thought they struggled in our very large room. 3 years ago my dealer brought out a REL S5-SHO to audition. Wow! what a difference across the board, not just low frequency. Even vocals sound better. A much more open sound. I only wish I could have purchased two of them. Dialing in is very subjective it seems but worth the effort especially if you have a dealer who is trained to do it.

Great review as always, Tarun. I run two REL T7i subs in my system. These really do enhance soundstage and fill in room volume extraordinarily well. BMW, Rolex, REL

I recently added a sub to my system - I just put it in the corner and all the bass appeared to come from in between the speakers - I think I got really lucky - it's awesome.

I was recently at the stage of building my 2 channel system where it was time to add a subwoofer, and I chose the Dynaudio 18S. The reasons for this choice were that I wanted 2 channels of bass in a small footprint that could reach lower frequencies (16 Hz), at a reasonable price, and could work with my Hegel H90 Variable Line Outputs. I had tried the KEF KF92, but discovered a little talked about issue with the Hegel Line Outputs. The issue is that the power output from these outputs is VERY low. The Line Outputs did not provide enough power to drive the KEF. The Dynaudio 18S (and its cousin Sub 6) solves this Hegel Line Out problem by having an adjustable sensitivity for its Line Inputs. The adjustments are from +6 db (1 Vrms) to -14 db (10 Vrms). I set the sensitivity to +6 db and this works for me. I am also a fan of having adjustability of the input level from my DAC to the Amp. Having a DAC with a volume control (pre amp) allows for tuning the input volume from the DAC for best dynamic range for the Amp and perhaps other properties.

Thanks Tarun, for yet another excellent video and specially for suggesting the sound tracks, there are in my Apple Music Play List now :D

Quality subwoofer reviews are rare on KZfaq, I'm ooking forward to more.

Hey Taren (forgive me if I misspelled your name), I just wanted to let you know I really enjoy your content. It seem as though reviewing can be somewhat subjective in deferent ways and dependent on context. It must be a balancing act to be fair and objective while still giving your opinion on a product. Sometimes it feels like reviews can err on the side of not giving their own personal feedback too much. I love your rating system at the end. I want to know what a reviewers personal take is and not just the objective facts of the product. Also, you just seem like a really nice guy and how you make your content is gracious and accessable for "lesser" audiophiles. That is huge. I may never be in a position to purchase many of the products you review but I still feel welcome to come along for the ride and learn. Thanks for the great channel.

Thanks for covering this. My most recent experience with sub placement was with the REL T9x and Magnepan .7’s combined with components from PS audio. The result was wonderful in terms of creating greater dimension, depth and refinement to a wide range of music. Although interested in the smaller T5x and though they have been reviewed a great deal, I’m most interested in your assessment of the KEF Kc62 and the SVS micro 3000 for smaller to medium size rooms. More so now that I have a pair of Buchardt S400MKII’s and which already deliver well in terms of bass performance for a small speaker.

Outstanding presentation one more time...Thank You Tarun.

Though I don’t own a pair of RELs I’m totally onboard with high impedance integration. Made my pair disappear. Seems so logical that feeding your sub(s) the same signal that you do your main speakers would be the ideal solution. I can only endorse doing so. I’ll never go back. Thanks for promoting this method.

2 years ago, I seriously upgraded my system, with the lion’s share of my budget going on a substantial pair of floor standers. I also purchased a pair of Rel T9I subs. The floor standers arrived about 5 weeks prior to the subs, so I had plenty of time to familiarise myself with the qualities and virtues of my floor standers as stand alone units. They’re damned good and reach really low. My hifi has to fight for it’s right to be in our family lounge. So, when the Rel T9I subs arrived negotiations with the aesthetics committee, AKA the wife, determined that they were to be located along the same wall as my floor standers. Experimentation proved that for optimum results at the listening position, placing them on the inside of each floor stander worked best. I too followed Rob’s advice for setting them up ending up with both gain and crossover set very low. For months and months I experimented with the phase setting. Taking Rob’s advice definitely created stronger bass, but the opposite setting gave a much more emphasis on the initial attack of the bass notes and I couldn’t make up my mind as to which setting I preferred. Last June I updated our sofas. The new sofas killed the room, deadened the ambiance. I bought a third sub. A Rel T5X. I know this sounds crazy, but I placed it on the floor, in the centre of the wall behind the listening position. I had to play around with the settings and reduce the gain on the T9I subs even further, but after a bit of experimentation. It all clicked, even the phase settings. A huge improvement to all dimensions of the soundstage and seamless integration with my main speakers. I specifically chose the T5X as the 3rd suv because it was to be boxed into a restricted area. It’s smaller physical dimensions and single down firing driver, just work. When I first contemplated installing that 3rd suv, I was seriously considering the Kef KC62 because of it’s tiny size and high performance, but my dealer steeered me away from the Kef. I am content with the current speaker arrangement.

Brilliant as always. I’m a REL owner and I found your analysis spot on. Subs require a very precise integration of trial and error but when done properly, add a dimension that is intoxicating and habit forming. Every system can be improved with a properly integrated REL.

Fantastic review Tarun , thanks A Lot

This video was recommended to me by KZfaq cause i watched several rel reviews. Great video you got a new subscriber. Planning to buy 2x t5x for my focal choras

Have a pair of T7i subwoofers. Would not listen without now. Change was like night and day. Larger sound stage and the feeling of being in a live performance. Like going from 2d to 3d. It was like discovering some secret that the hi fi industry was keeping from me.

I have tried svs pb4000, jl audio fathom f112V2 and dual e112's. Also tried paradigm prestige subs. Just purchased a REL S812 and it's by far the best I have had for music. My speakers are Neat XL10 and I have sim audio electronics and nordots V2 cabelling. This sub integrates seamlessly, keeps up with the speed and now that I've set it up properly I feel no need to keep playing with the controls. The other subs always sounded like there was a sub playing bass. The REL sound like my speakers are just playing insanely low bass. Highly recommend. Wouldn't want to listen to my system without now.

I bought a Yamaha sub some 20 years ago. It has the frequency adjustment for crossover and can be powered from speaker terminal or sub out from an amplifier. It was initially great with my setup and would deliver plenty of slam in a multimedia context. Then tried it on a revealing system with Quad electrostatics - it showed here the shortcomings as it just provided a coloured bass without much detail. It now just gets used when watching a movie.

Nice job Tarun! I have experience with two subwoofers. Had an old HSU 15 inch with dual ports before. Never liked it, just couldn’t get it to blend in well. A little better when I plugged both of the ports. Nasty chuffing! Now I have a REL T9X. Absolutely no comparison in my opinion. The HSU went just a little deeper but always sounded boomey no matter where I put it. The REL is better in every way. Sounds great with any of my speakers. Looking to pick up another one as soon as they go on sale again. 😁

I run a pair of these T7x subs with my concept 500s from Q Acoustics. 1 of these was good but the second evened out the room so much. i could not go back to one. They are so good. I won’t repeat everything everyone already said about sound stage and impact but man. If anyone is reading this and wondering if you should grab a single higher up model REL… I’d suggest getting these in a stereo pair instead. Save some money and enjoy the stereo benefits that any singular sub cannot offer. Enjoyed the video :)

I bought the REL T5x last November during the 10% off sale. $550. Love this little bottom feeder. Small, black, lightweight. Need one more. Like the 5 as you don't stare at REL all day. Agreed that corner setting was bad/boomy. Place next to a speaker or in the middle.

Great review. I recently added Qacoustics QB12 to my Qacoustics 3030i. The impact on soundstage is huge! Yeah the bass extension is great...but the added clarity and width was unexpected

Thank you again for a well informed and cleanly presented video. More and more Hi Fi listeners are now delving into the Sub market. I like you have had a sub for decades. And I will argue ferociously with anyone who says "subs ruin the sound" I started with an REL sub like you .but mine was a smaller cube I bought for about £250. For the life of me I can't remember what model. I then replaced it with the B&W pv1. That really pleased me (not my neighbours). Can I suggest that rotatiing the sub on the spot also has a real effect on the sound integration. Although it does upset the look. Keep up the good work 👏

I have the bigger T/9x - this really improves the presence of musical instruments and the upgrade is particularly striking with piano and with jazz music. Considering my system cost £15k, then £1300 for the sub bass unit represents a real ‘value for money’ upgrade.

Love the channel! The one thing that REL subs do better than most any other subs, in my opinion, is that they disappear into your system. When I sit down to listen to someone else’s set up and can immediately identify the existence of a sub and even worse the position of the sub, I know we need to spend some time on set up. When a REL sub is properly set up, the resulting sound is an extension of base from your two main speakers. The best comment one can ever give a sub is that you must have a sub in the system because there is no way your speakers are producing that sound without some help. My REL in my two-channel system is located directly left of the listening position, certainly not a traditional placement, but I will wager most any amount that no one could identify its location. Thank you for all of your research and clever commentary.

Tarun, thanks for the great channel and many insights. I spent a lot of time on subwoofer integration and eventually ended up with a pair of JL Audio E112"s and a JL Audio CR-1 external crossover. There is a controversy around splitting externally the source signal separately to the main amplifier and the powered subwoofer, and I came down on the side of splitting that signal. I have tried the other alternative and find that it is almost impossible to get really good results. I have had the CR-1 now for about a month and it justs gets better as the whole system gets used to each other. My other main components are a Parasound JC-2 pre amp and a JC-5 amp with Magnepan 1.7's that I have modded a little. Two subs make the room adjustment moot, and the CR-1 allows for damping and satellite/sub balancing. Some big names in audio, like Paul McGowan of PS Audio, do not think splitting the signal like that is the way to go, but lowering the load and signal width for each the subwoofer and main speaker were compelling to me, and listening to the completed system was the proof in my opinion. Thanks again, and keep up the good!

Just a quick note to say I very much enjoyed the music you suggested with regards to evaluating bass performance (even the Pan Sonic, LOL). I run Nautilus 805's with an SVS SB-4000 rolled off at 38 hz. While I'm not sure what you're hearing, my bass was weighty and articulate without being boomy/muddy. I think I have it dialed in as well as possible without resorting to room EQ and DSP. Anyway, I was blown away by Ellington's Afro-Bossa. Tremendous in every way. I don't know how this got past me (and I consider myself a jazz fan). Keep up the good work. It's appreciated.

I am currently using 6 x 12" powered subs in a 2 channel system. People say it's overkill, on paper "yes" in reality "no". Using 2 subs was excellent, 4 subs was definitely an upgrade, 6 subs is basically perfection. I got the idea from REL the way they stack their subs, it might look overkill but in reality that's far from the truth. It's all about getting the setup right and it takes time and effort but it really pays off, I cannot see myself ever going back. The subs are turned down really low and are very subtle and at times you think are they even turned on when listening to music but in movies when there is an explosion and it hits you in the chest , WOW, yes the subs are definitely on. If you ever get a chance to experience a well setup stack of subs it's almost a life changing experience and it's hard to pull yourself away. Personally, it was money well spent.

Hi Tarun - Really enjoying your channel. Have watched every episode since you started. Would really value more guidance on subwoofer positioning and integration either from yourself or the community. Would make a great subject of one of your tutorial videos which are excellent (I did see this video has been added to that playlist).

Re your question about our experiences i use a rel s510 with Quad 2805 electrostatics. It integrates perfectly and the result is utterly amazing. It is fast enough to work even with electrostatics! Great video thank you.

I know you like ATC speakers, and so do I. My dealer was so kind to lend me the ATC C1 mk2 sub, and compare it to the REL T7x. Quite the price difference, but what a great sub. In my opinion it perfectly extends the SCM19's in the low end. It arrived last week, and I already feel like I can't live without it.

My wife caught me crawling towards my REL sub a few weeks ago. The look she gave me could never be confused with anything other than “regret” or “buyers remorse”. Nevertheless, I did achieve excellent placement per REL’s suggestions. Any advice on how to repair my marriage, Tarun? Excellent presentation, as usual. Thank you, again, for the highest quality content.

Hi Tarun, thanx for this- as always - great review. Had the T7X to try at home only recently and can confirm the effect you mentioned: It not only adds bass weight and extension but also soundstage width and depth leading to an overall nicer smoother tonal characteristic of the system. The only caviat is that I felt like it is not fully catching up with the speed of my main speaker (System Audio with 2 small 14 cm/5.5 inch woofers). Which lead to a reduced dynamic impact especially with electronic music. I wonder if you experienced something similar, as I would asume the ProAcs being quite fast speakers as well? So my quest for a Sub that does integrate even better (maybe the smaller T 5X, etc.) and would love to see you reviewing more Subs on this channel. Keep going with your great work. Cheers Bernd

Catching up with the channel, always better. Thanks!

I remember that big REL. Amazing...listen to it at the shop...the owner didn't put it for audition anymore as he has to fix the cracks in the wall. He had some tracks with 12 hz tone. You could t hear it ( only the harmonics)...but boy did you feel it. Amazing sub

I use a mini DSP to filter my REL subs at 80hz. Above 80 goes to my Magnepan LRS speakers. And because there is Dirac, the integrations is a peace of cake.

I've got a pair of t9i's, could never go back & will be upgrading in a few years. It's not just bass, they make the soundstage enormous.

Hi Tarun, Lovely review! Of course agree with you that the REL is still the Rolls Royce of subwoofers. I use the Sonus faber Gravis B1 subwoofer with my Sonus faber Cremona floorstanders painstakingly set at the correct settings for my 2 channel listening on both vinyl and cd. The Gravis B1 was one time the reference subwoofer of Ken Kessler who also wrote a rave review of it. A subwoofer definitely adds more body and definition to the music provided it is set up correctly. Fully agree with you on that. Please keep posting your sensible and well elocuted reviews as I love them as much as I like British HiFi gear.

I’ve got a pair or RELs - T9x and an HT1205. A heavenly pair and digs super deep. Amazing!

I've had an interesting journey with my REL T/7X. I own a pair of Harbeth 30.2XD speakers and their owner/designer Alan Shaw is emphatic that a subwoofer is not necessary. My amplifier is manufactured by a long-time friend of mine in California and he also said a subwoofer is not necessary. After much deliberation, I ignored both and went ahead with purchasing the T/7X .. and boy am I glad. Once I got the REL "dialed in" the audio performance of my system improved substantially. Once in a while I'll forget to the turn the sub on and I immediately notice a qualitative decrease in audio performance. Night and day. I can't stress enough, at least in my experience, the importance of the REL subwoofer even with very high performing speakers like Harbeth.

I recently picked up the T5x I have a small room and followed the recommended setup. But then moved the speaker to in front of and almost center of main speakers and the sound just opened up huge. I is almost against a credenza and think it helps the sound.

Hi Tarun - My answers were: 1) Porsche, 2) Rolex, 3) REL. 😀 Go figure! I have been auditioning an REL S-510 the past few weeks as part of my 2-channel system and have decided to keep it. It really does enhance the sound field in a non-obtrusive manner. It just seems to fill up the room and makes the listening experience that much richer, without really knowing that its even there. I just came across your channel and am highly impressed. Really well done videos. Bravo! A bonus learning in this one: “a pain in the jacksy (-sie?)” 😂 This American is going to get good use out of that. Cheers!

I still have an old Audio Pro Sub Focus, with a 400 watt class-d amp and 10-inch driver. With a bit of placement and phase tweaking and isolating it from the floor, it offers an additional dimension to my Quad S2s I would not live without. In short it gives the soundstage the... stage. Could also be noted that my room is at least partially treated, which I think makes the spatial benefits more clear.

Hi Tarun, Thank you so much for convincing me to buy a subwoofer, the Rel T7X to be more precise. It is now up and running and the musical improvements are quite something: wider and much deeper soundstage, much more separation between the instruments, piano’s sound like real piano’s, all string instruments come to life (not just bass or cello). All types of music sound much more musical. Some music which was just too harsh on the ears all of a sudden sounds perfectly balanced. Considering the price of one Rel T7X, the musicality improvements of my system is nothing short of sensational. Thanks again!!! I suppose this is bad news for high end speaker manufacturers: I’ve paired the T7X with my Rega Jura speakers of 22 years old. I don’t think I’m going to replace them any time soon (whereas I was contemplating buying the Harbeth SHL5plus XD). Rest of the system: Rega Mira integrated amplifier (also 22 years old), Roon on Mac feeding my Aurelic Aries (wirelessly), which is connected to the Chord Qutest with a linear power supply (the Farad Super3).

I'd really like to see you review the KEF KC62 and compare it directly to REL T7X.

I got one just like this, it's probably not setup correctly, but o boy what a difference it makes! I love my Rel T7/X :)

Hi Tarun. Thanks for an entertaining and informative review (as ever). The track list is a useful feature. This topic is a classic case of "your mileage may vary". *Position.* I am currently listening to the fourth sub I have had in my system (2 borrowed, 2 purchased). Having tried a wide variety of positions, my favourite and current position is spiked to a low (~12") and solid table, dead centre between the speakers. The spikes made a significant improvement. *Cross-over setup.* I have a track on my music server which is a sine wave sweep from 10 to 200Hz to set-up the volume on the sub. This also highlights peaks and troughs in the room response. I have a roughly square listening room and the peaks are significant (see below). I also have a series of single frequency tones useful for setting phase (which has always been 180 degrees for my system, my power amps being inverting and I use the low level sub input). If I want to get really picky setting the crossover, I also have a tone generator (a handy piece of kit for a DIY amp builder). *Additional.* I consider myself something of a purist but was persuaded to try a device named "anti-mode". This sits between your amp and sub. For the basic set-up, you put the (supplied) microphone roughly where the bridge of your nose is when listening and let it tune itself. It squawks and warbles to itself for 20-30 minutes then creates a filter customised to your room. As I understand it, this is basically a series of notch filters to reduce the effect of room resonances. The improvement is absolutely jaw-dropping. Notes start and stop quicker, music containing a chromatic scale played on a bass have all the notes at the same volume and bass detail and focus are way better. I was so impressed that I bought one. *My equipment.* I use a BK XLS200 Mk2. This brand is probably better known in professional audio circles. Spec: 390D x 295H x 295W sealed box, front-fireing 10" Peeless driver, 275W amp. The cross-over can be completely bypassed. It weighs in at 17.5kg, roughly twice that of the Kef which preceded it. The anti-mode is a DSPeaker 8033 and can also function as a cross-over. I tried the sub and external cross-overs and prefer the external one in the anti-mode. I have a headphone set-up with dedicated amp (triodes of course) which I use as a reference when setting up my room for speakers. I would be fascinated to see a future review with Tarun trying an anti-mode subwoofer set-up.

I have the same thoughts as you do here, Tarun. I think your room acoustics are not meant to host this specific subwoofer therefore the placement of it could be described as an equation with no solution (all other things equal of course). Maybe a couple of subwoofers (like the T5X or Tzero MKIII) that fire downwards may be a better match for your room as it is in this video. All my respects to your work as your reviews always guide me in a very positive way on my audiophile journey :)

I recently added a rel t5x to my ls 50 meta, They integrated so well. Previous sub always sounded slow and boomy. Rel was a large improvement.

I agree, i bought Arendal 1723 1s subwoofer it has completly change my mind on how i think about subwoofers its really good, i needed one with good power, and it is beast as much as it is musical

Hi. (Maserati, Bremont, REL) I bought a REL Quake back in the early 2000s to supplement B&W L/C/R and KEF egg surrounds, and what a tiny cracker it was. So good that it is the last piece of kit to be upgraded. I have had a T/7x for nearly a year now and am completely in love with it, and my quake, it runs Hi level input from the centre speaker as suggested by the guys at REL. The customer support from REL Bridgend is astonishing; suggestions, advice, tips, and a chat! I’m getting a Tzero to replace the Quake, and the Quake will be moved into the study to support my PC speakers.

I bought a T7x this week. Shame Tarun isn't on commission as I also bought a Willsenton R8 and Amphion Argon 1's based on his reviews. Wow, what a difference this sub makes. It's night and day when you switch this off and compare without. It just adds so much to the overall sound. Thanks Tarun.

Nice review, after trying out a few subs I still have mixed feelings (only used for music). The 'perfect' placement and adjustment give me stress 😅 With one track it is perfect and with the next song I feel the need to adjust 'something'..

Appreciate the in depth review, I’ve got a pair of Buchardt S300 MKII’s with a Rel T9x 2.1 set up and absolutely love it. Next upgrade will probably be to add another T9x 😂

I currently run a SVS SB3000 sub, along with Kef LS50's, soon to be Buchardt S400 MKII once they arrive. I use a mini DSP for integration, works pretty well. The SVS is reasonably "musical" but can be a bit "muddy" at louder volumes. I have the Rel subs on my list for a possible replacement option, hopefully this year, or if the Buchardt produce enough bass, I may just go without... At any rate, very nicely done per usual with your review, I will refer back to the playlist for integration adjustments.

There's no system that does not benefit a little to a lot by the addition of a good sub, or two! People often fail to understand how even full range floor standers will still benefit from a quality musical sub. The two early sub makers, that are still making quality musical sub, where REL and Velodyne. I have been using a Velodyne HGS 15 for 20+ years and it's still one of the best subs made and still running great. When the Velodyne finally dies, I will perhaps try a REL. As you say, once you had a quality sub correctly set up to the system (which is much easier to do than it was back in the day...), there's no going back.

Thank you for another wonderful video.

Thank you, as usual. Another great sub track as a reference is The Japanese House “Maybe You’re the Reason”. Listen especially for the low keyboard tone in the chorus. This should be just audible with a bit of that “room pressurization” you’ve heard of. I’ve used it for years now and all other music sounds great when I get that dialed in to taste.

Hi Tarun I love how you include your technical knowledge, which seems above many other channels to compliment your subjective opinions. You're the first reviewer I have come across that actually opens up the. amplifier in reviews with a decent analysis of how well the product was designed. During the beginning of my journey into audio, I researched many aspects including room acoustics, and experimented with different setup topologies. All though I have forgotten some things the 5ms first reflection threshold is something that has always stuck in my mind and you are one of the first channels I have come across to mention it. I prefer live recordings when done well and try to replicate that feeling of being there. As such I found I prefer to include a 1 subwoofer or more plus a discrete center channel and these are the reasons I think this is the best setup. Bass interacts with the room differently therefore it makes sense to me that a full-range speaker is restrictive as the optimal placement is not the same as for the other frequencies and a sub gives you this tuning flexability in placement. In the early days moving from mono recordings to stereo, many advocated for 3 channels over two as the best solution for both recording and reproduction. In fact, many early classical and other recordings were done with 3 microphones to 3 tracks. Two-channel was adopted as the standard only because it was an easier prospect financially for many consumers at that time. In the quest for my goal, I settled on a unique setup to include 3 front channels plus subwoofer(s) for lower frequencies with a caveat. I use 1 surround sound receiver to upmix from stereo to multiple discrete channels for my center speaker. I run a second receiver in stereo mode for the left and right speakers. So basically I am combining a stereo phantom center image with a discrete center image. I like the soundstage and imaging I get in this configuration with proper speaker positioning and calibration. I think this works because as you mentioned previously as you toe your speakers in you get a better center image but reduce the width of the soundstage. In such a configuration, you can have a good wide soundstage and center image. It just seems more holographic to me this way as the stereo imaging combines with a real discrete center. And then of course add additional channels for cinema which I do not prefer for music listening. Also, have you any experience or opinion on an amplifier with Triple Darlington architecture? Do you have a preference for a Bipolar amplifier over Mosfet? My concern with running the REL from speaker-level inputs would be you are amplifying again any noise introduced from the first amplification. My understanding however is we may be less sensitive to it at the lower frequencies.

Hi Tarun ! In the late 90's I bought an Energy ESW-V10. It was good for movies, rattle walls and windows, but not with music. 7 years ago, I bought an Energy XL-S8. It is quicker and add to the 20 to 80 hertz range without the subterrainian rumble, so it is much better suited for music purposes. Great video!

I have 2 REL Q150's and can't imagine listening without them. I've had one for over 20 years and I bought a second at a bargain price of £100 last year. Everyone who listens to my system comments now on how deep and wide my system sounds. I believe 2 subwoofers with high level connections a far superior performance to a single Sub. I'm interested in the delay you mention as mine are the same Generation as your strata so I could imagine I'd find the same replacing mine, but £2000 pounds worth of improvement over what I have I'm not so sure. If I get issues or failures then maybe but I think that money would be spent more wisely elsewhere first on my system. As always a great review with some clear explanations of how things work 👌

I recently helped Michael from Poetry on Plastic dial in his "Little REL" along with his Harbeth 30.2's. EXACTLY as you described. Excellent Video once again my friend.

Wow thats major. You get the benefits of using high level inputs, without having to use an additional pair of speaker outputs. Massive win for me, since I was considering the kef kc62, which goes into standby when volumes are too low.

Once again thanks for an excellent review. I have never been a 2 channel sub person, but, I do have one on my 5.1 TV set up. Having heard (by accident) the new KEF KC62 compact sub i may now be tempted, as always though, I need to educate myself about getting the integration correct. So a lot of learning on the way as I don't want any booming whatsoever. FWIW I went for Porsche, Rado and REL.

Thanks for the review. Will add the REL to my shortlist of subs including the KEF KC62. I'm looking for a little extra bottom end to supplement my 40yr old Celestion 551 speakers.

Love the channel, And though I don't have the Tx7, I do have the Tx9. I never bought into the idea of a Sub in a home HIFi.. Always thought it would sound like the garbage that is associated with automobile systems. Loud, booming, and annoying. I was able to listen a bit at my local Audio specialist and just a day or two after taking home and setting up my new Rotel/B&W system, I went back and bought the REL. The fact that it had a 60 day return policy,, no questions asked, made me take the chance. All I can say is, WOW. Not one regret, Not even the fact considering price. This Sub totally changed my mind about Subwoofers. It's not inexpensive, and I think that's the magic. That's what makes the difference. The entire soundstage sounds amazing. Your review to me is on point and very accurate. You said it much better than I could write it.

Good evening Tarun you were right on the money when you told me start with 30 hertz with the Buchardt S400 MKII my system never sounds better thank you 🎸

Taron, I really enjoyed your overview on REL subwoofers and music recommendations. My three favorite things, 1) Porsche 991.1, 2) JLC Reverso and 3) A pair of Jl audio D110’s paired to MA gold 100 5g’s and driven by Yamaha AS 2100/ denifrips Pontus DAC/ Roon Nucleus with Farad Super 3 LPS.

I have been using REL subwoofers for several decades, becoming a convert in the late 1990's. I previously hated subwoofers with a passion due to how they slowed the music and ruined the timing. That all changed when I heard a REL Q50. I currently use twin REL #31 subs with my main speakers which alternate between Proac K6 Sig and Magnepan MG20.7i. With each of these speakers they integrate seamlessly and not only improve the bass extension, but also (and more importantly to me) greatly extend the soundstage depth, width and height for a more spacious soundstage. This added space is accompanied by greater midrange details - a bonus that many REL owners experience and comment upon.

I have two SVS SB2000s paired with my SVS Ultra Bookies. One sub is placed in the front corner, the second is on the sidewall near my listening position. I use room correction limited to 250hz. My high and low crossovers are both set to 80hz. Gain is set to where I can’t hear the subs, only feel them. I added the second sub later. Huge difference. Made them melt into the overall sound. Whatever upgrades happen later will include at least two subwoofers.

REL are something really special and are made in my birthplace of Bridgend, S Wales. 😁 They will be my first choice of subs for my hi-fi system. I'm thinking of 2 T5x subs in my 16x11 foot room. One for each channel.

Thank you for the review of the T7X. I have had mine for about a year now and I've been happy with the sound and the speed however I'm still trying to find the right placement as my room is fairly long but very narrow limiting where I can put it. I'm looking into new speakers and hope that I can reorganize my space to make them sing.

Alpha, Omega REL I've used REL over the years, always been happy with the sound.

I have a JL that I am completely satisfied with and it’s quite flexible with its setup.

I actually bought a pair f t5is about 4 years ago and love them. Might one larger sub have played lower? probably, but the effect on the sound and imaging has been fantastic. And pretty much a long way up the frequency range or at least that is how it feels.