Wow, the amount of effort to model and then build all these enclosures is phenomenal. You did an excellent job of both. I have always wondered what the differences would be in real life and not just computer software modeling, now I know. Thank you VERY MUCH for your effort and time and $$$$$$ spent on this educational exercise. The Best video on this subject by far!

Great video! This is the first time I’ve actually seen someone model, build, and measure so many different enclosures. I’d love to see how a t-line compares!

At one point in my life I worked at wholesale car audio Warehouse. I had a ball playing with every single speaker, box, crossover, amplifier, head unit, Gadget that came into that place for the too years that I was there. It was a great learning experience, When I was ready to install my own system I knew exactly what I wanted made things a lot easier for me they would even let me borrow equipment and install it in my car. couldn't ask for anything more. Out of all the sales people that were there nobody really knew what was going on or was even into the equipment so when people would come into buy ,they would always come over to me.

Have any of you tryed the Earthquake Slap's passive radiator's? The 10s, and 12s Slap's unit's, have 4 inches= 100 mm of Total= Peak to peak X Max, and the 15 inch Slap's, has 4 and a half inches= 112.5 mm of Total X Max! Plus the Slap's unit's, are designed to perform best in the active/powered subwoofer's mfg. rec. sealed enclosure size= not the ported size, like most people think. Also less cancellation will occur with the active driver(s), NOT on the same plane as the passive(s). The guy in this video did a great job, thank you very much, for taking the time, to do this video for us all❤️

Great explanation! Mostly confirmed what I thought I already knew, the thing I came to realize from this presentation is that I've never appreciated passive radiators enough. I've been building and installing car audio systems since the late 80s until the early 2000's (before I had to get a real job lol), and I was mainly trained by Orion and Pioneer (not a big pioneer fan, but boy, is their technical training ever good!) and to a lesser extent by the other companies that the various stores I worked for carried like MTX, Sony, SAS, Coustic, Eclipse, Nakamichi, Dennon, Clarion, etc. etc. etc... I even owned my own upholstery and car audio shop for a few years (super fun, but didn't make much money at it, turns out you cant charge for the full 37 hours you have into a pair of super custom, factory looking, leather wrapped Audi door pods that fit three 6" speakers and tweeters each). I understood that there were those vehicles out there that allowed you to have enclosure choices, that you needed the driver's TS parameters to calculate and design the optimal enclosure for that driver. My reality was that 99% of my customers wanted to put 10's and 12's (even 15's and 18's) behind and under seats where they would physically fit but there was nowhere near enough air space. So my reality was that I was almost always building enclosures for the vehicle not the driver. I mean, I really tried to get as much airspace as I could possibly get, I often used fibreglass bottoms and backs on my enclosures to conform as tightly as possible to the curvatures of the vehicle. There was some really impressive bass from small spaces and it was tight and clean and those customers rarely blew their subs and were usually pretty happy. When you sell and install the same gear over and over, you get a really good sense of what it should or can sound like in an optimal enclosure vs a small sealed enclosure. I always knew the sub woofers were limited by their small sealed airspace but that was the sacrifice that had to be made. Now that I understand passive radiators more, I really regret not having used them years ago in those small sealed enclosures that severely limited their sub woofers. My systems could have been so much better... So much better...

Very very scientific. I can also appreciate the effort, preparation, hours and expenses that would've gone into creating this video. Kudos

that was of the greatest comparsion in the last decade. big thank you

Great video, just note that not only does the passive radiator allow for a smaller box, but it also eliminates chuffing if you have a large xmax.

In the old days hanging your amps upside down caused them to run hot! I was taught that any position except upside down was ok. You spent a lot of time here,good job.

I’ve been a huge fan of Audio Judgement, your website and blog, and have learned so much there. I’m really glad to see you with a KZfaq channel. Much love and respect from a huge fan and colleague.

What a great video, editing, time spent and all the work with the boxes! Helpful and informative!!

What I've been looking for many years has been explained in this video very explicitly.Great Job Marcus.Looking for more loudspeaker/enclosure related videos

Great information! Very concise and well thought out. Love it when people can model AND build AND be extremely well spoken. Keep up the good work my friend!

Great video! Absolutely love the attention to detail and time taken to explain every aspect of the tests - A+

I've just recently come across your channel and I must say it is awesome. Thanks for making these great, informative videos. The amount of time you put into the videos is incredible! I have two comments on the video. First is that most people tune their ported boxes higher. 22.5 is crazy low for car audio. I know you were going for the flat response, but most people would tune in the 28-34 range in favor of output. Second thing is that these boxes all have different group delay so they will sound different. Output and box size isn't the whole story IMO.

Man head down .Best video on this topic

That's awesome man you put a lot of time into that it's appreciated

Fantastic video! You actually explained many concepts that I've been struggling to understand for a while now. Very nice presentation and editing as well. I appreciate the little bits of humor here and there also. You just got a new sub (scriber, not woofer, lol) from this video. ;)

Excellent job on this video! Info was presented perfectly!

Very detailed explanation. Answered most of my questions..

Great job testing and providing so much data, this is really helpful for over-analytical types like us to come to decisions.

Hi, this is awesome !!!! waiting for new course, it has been very long since last 201.

this is the comparison video i looking for. glad u explained it all in here. thanks

Super! Ai explicat foarte bine diferențele dintre respectivele tipuri de boxe. Foarte folositoare lecția!

That was fun and informative, I've never seen all those different boxes or had them explained very carefully. Thanks

This is an awesome video...THANKS MAN!!

Awesome video and wonderful explanation !!!

Really great work

Wow! best enclosure video on youtube. You got my subscribe. From all boxes, passive radiator is most satisfying. Its small efficient and have a nice low end and SQ. Really impressed!

THANKS FOR EXPLAINING ISOBARIK SPEAKERS AND DECIDING HOW TO ASCERTAIN SPEAKER BOX CONFIGURATIONS !

very interesting video, i didn't even know about bandpass enclosures. your explanations are very clear and easy to understand

wow wow wow.. Truly awesome work!! Great explanation. I hope you get a lot more views and can share this knowledge because it will help many people. Awesome 👍🏼 Thank you!!

good effort,appreciate your time and knowledge.

Awesome video! I've watched all your courses on Udemy you've helped me a lot :)

well remember the cabin gains, that is almost the exact gains added to the 4th order. I was hoping you would catch that. Overlaying the car gain and the 4th order.

i have a 10w6v3 its such an amazing speaker.

Nice video. Thanks for your efforts.

Very nice explanation.. Thanks a lot..

Outstanding work!! :O

Very nice and funny presentation, thanks! :)

Cheers from Texas! 🤘😎🤘 Thank you for doing this. My son and I have always been interested in cabinet design. Fascinating! All the best M

appreciated your work, you really work hard for this video.. great job sir

Thanks for this VIDEO 😉

Nice work, keep going

Nice work 👍.

so far i think im either going to go for a full size sealed, or a passive small, i dont like messing with ports because i seem to always mess up ports.

Ive been looking so hard for some info/comparisons like this for a while! thanks a heap, epic work!

Fantastic Video!

Amazing video. This is how you do it.

Very interesting channel. Professionally and understandably presented information. Well done mate.👍🙂❤

Great video!

Thanks for a great video

excellent video !

Don't forget to factor Le into the response graphs, and reducing port volume increases enclosure net volume, which is something that has to be factored to tweak tuning by modding the ports on already built enclosures. It's also worth noting that horns cause horn resonance. Also the parameters of a driver will control it's ability to play below fs, and ebp will determine which enclosure type is needed for the flattest amplitude in bandwidth.

Hi. Great experiment. I have an 43L enclosure but driver I have ask for optimum volumes of 55L sealed and 161L vented. The resonant frequency of the driver in 24hz. What’s my best option if I use that speaker in that enclosure? Can I just make a port tuned to lets say 28hz and get decent results even when not optimal or what? Thanks.

In terms of clarity, or accuracy, or transient responce or fast bass for instrumentals drum beats which enclosure is better ??? Sealed is popular opinion and then bass reflex, and then remaining designs. Hope this is right ??

Nice work. Very appreciated. Fyi: TL sub and rear, front loaded horn or folded horn will easy kill all this kind of enclosures!

I've always loved my bandpass box it really had a intense Thump in my suv. And my subs at home are passive I get really crazy lows for movies. I am throwing my sub in a ported box tomorrow in the suv as an experiment I know my mirrors are gonna shift like crazy...

Great video

That sub that u choose for the demo is perfect for a sealed enclosure because the Qts is greater then 0.4 and smaller then 0.7! Otherwise this is a great video

Great work thank you for your video....I would like to hear your opinion on which box sounded best in your vehicle and which you would run with in your personal situation?

I really want to learn more about passive radiators.. It just seems like there is a huge lack of knowledge about them except for the super top secret labs of major audio brands. How do you tune them? What size do you need? What does the suspension compliance do? Can you just tack some radiators on to the side of an already built sealed box?

your video is very informative nd very interesting

Thanks for information. how would be in transmission line enclosure??

I'm really learning. Thanks a bunch Got Morel Ultimo SC 12" inch sub 10hz-900 range. Can I build a 6th order for 16-20hz low & 30-34hz high ? Wonder if to big for truck of car? 40"x18"x 24" is about as big as I can go. Thanks brother

Hi from México I have 3 15" Dbxi earthquake. My friend Wich is an ing. Expert in audio, designed 2 boxes for each one, a sealed and a ported. The ported has an aero port of 6" diameter and 15" deep and is enormous, my first thought was that I could not listen to jazz music. But surprise, jazz music sounds better than the sealed box. At 20 herz the sealed is terrible bad. I made my proofs using the same amp and same equ and same power. So for me I prefer the ported box, just if it is well designed.

Great explanation, it would be great if you include the sound of each enclosure so we can hear the difference

We need more videos on this

Excellent video excellente

Small Bluetooth speakers also use passive radiators so that the speaker can remain sealed in case it gets wet

What about porting the ported enclosures through the "ski pass-through"? I'm trying to do something like this with my GS400, where the port would be located and fire directly under the 10" hole in the rear deck, where the factory subwoofer was removed, so that those soothing pressure waves can travel into the car. The sealed box I built sounds great when the trunk is open, and I'm standing behind the car, but not much bass makes it into the cabin space.

great video. what softwear do you use to design subwoofer boxes ?

Awesome vid! Cleared up a few misconceptions fur me. But I really want to know more about passive radiator xes, how do u determine size of radiators, how many radiators and size of box vs free respiratory nose. Since they are small boxes, I imagine many times we have wiggle room to make a box bigger, how does that affect response/output?

Hey, I am curious. Have you ever made a video showing how to calibrate a microphone with the mic calibrator and how this works with REW? I have a microphone that doesn't have a calibration file so I have no idea how to do this. Any help would be greatly appreciated. You have already helped tremendously as I am doing an sq build. Thanks again

which type of enclosure is best for deep bass please tell me ported ,band pass or passive radiator does passive radiators are better for deep bass??

1.)What is it about 6th order enclosure box design that everyone says the formulas are prone to error? 2.) What does the formula look like? 3.) Where/how does this error occur? 4.) How do you recalculate to fix the error? Thank you for your time.👋😄👍☮

Not gonna lie, you had me on the first part haha if it was just a computer comparison, no mas.

the more i learn, the more i dont want to invest any more into building boxes. too many variables and unaccounted engineering to spoil the party. good thing space is always my leading constraint. GREAT video and presentation!

Great video. Shame the testing was hampered by the opening to the car cabin area. Would it be worth testing indoors for a closer comparison now the ca test is done?

would be interesting to see a `small` plugged ported box freq response and db. ive done some testing with different density plugs with good results. so a happy(?) medium of sealed and bassreflex

So is the ideal placement for a single radiator directly behind the driver? If so, why do most boxes have them on the side or the front?

Apart from the consideration of being able to access the subwoofer, is there any difference which part of the subwoofer is in the sealed chamber of the 4th order?

How would a transmission line (T-line) box fit in to all this. Its main goal is to have a wide frequency band like a sealed enclosure, but with higher output due to being a ported enclosure

I have a ported box tuned to 34 hz and a DB WDX12G2.4 with a skar audio RP2000.1D in a 2005 Scion xB. I just can not get my tuning right do you have any tips for me? Thank you. New at this

Your videos are absolutely wonderful, I admire your effort and understanding of the physics involved. Bose had, as usual, an ingenious way of supplementing bass in a tiny enclosure. Dr Bose was a true goddamn genius, check out his MIT acoustics course free online. I hope it is still there. I can't imagine adding to the nasty honk the car is already giving you.. 😁. Annoying comment follows: After living with Quad 57s for over 40 years (I have been in the audio industry this long) almost every box sounds horrible. Best having no box at all. ProAc Response 4s were one of my favourite 'boxes' that spring to mind. Stanley Lipschitz is someone anyone interested in speakers and audio should be aware of if they share the view cabinets are a (un) necessary evil. He can elevate your understanding of speakers, boxes and drive units, filtering etc to somewhere well beyond the norm. Bose is the pragmatic, physics based genius. Not sure I like the sound of his speakers though.

Orificiul prevazut liber intre portbagaj si cabina nu reprezinta doar " o cale de comunicare" intre subwoofer si cabina. Acel orificiu intervine acustic intre subwoofer si microfon ( cabina ) astfel incat se va comporta ca un nou filtru ( bandpass ) . Similar cu incintele Bandpass ordinul 6 cu dispunere TIP SERIE si nu PARALEL ( ex: incinta bandpass 6th din clip este un BP 6 tip paralel ) . Din pacate o incinta bandpass 6th tip serie este mult mult mai dificila decat tipul paralel datorita interdependentei celor 2 frecvente de acord. Practic frecventa de acord data de volumul liber al portbagajului in raport cu acea gaura prin bancheta va modifica instantaneu frecventa de acord a unui subwoofer bas reflex aflat in portbagaj. Testele sunt interesante, analiza este corecta dar testele in cabina dezavantajeaza anumite situatii. In functie de rigiditatea portabgajului si de izolarea acustica a peretilor acestuia fata de cabina.....acea gaura isi va pune mai puternic sau mai putin influenta asupra anomaliei spontane tip Bandpas 6th Serie survenita intamplator.

You can cut slot ports, just use screws & no glue til you are done tuning

incredible job, you deserve all the merits! Greetings from Brazil

VERY HELPFUL DATA - THANK YOU - but I'm having trouble understanding the 'In Car' frequency response, because there does not seem to be any Cabin Gain... In fact, there seems to be a 'cabin loss', because the frequency response of the 'flat' curve ported version falls as said frequency gets lower... O.O But I may have an idea as to the cause... When modelling a subwoofer, the Transfer Function Magnitude Graph doesn't give you all the facts - at least not as much as the SPL Graph, which shows you the theoretical output of the sub, whilst catering to the MAXIMUM EXCURSION of the driver... With that in mind, if the xmax is reached at a relatively high frequency - say 45Hz in regards to the ported version - then the projected 'flat' response will fall short\decline as the frequencies being played get lower, & either the amp runs out of the power needed to maintain the same volume with those frequencies(I know that's not the case - just saying), or, the sub's ability to play any louder diminishes as it's xmax is exceeded... >.> So which is it? Why is there no indication of cabin gain? & why isn't there a bump in the response curve at the car's resonance frequency with all enclosure versions? O.O

It would be nice to see a part 2 where you do the same test again with the same subwoofer in the same boxes now that the speaker has been fully broken in. I’ve heard 6th order enclosures and some 4th order types can come out of tune with the box after use. I understand it depends on the sub how long it takes to age and there are other variables, but it’s still a concern for me.

what if a dual active sub push pull sealed design ? mutliple drivers ported ? / mutliple driver sealed ?/ mutliple drivers with bass radiator as thicc or larger surface and heavier cone ? or basiclly made the same thing as this but with 2 or more active drivers ? looking foward to see more about mutliple drivers n passive radiators

I haven’t understod WINisd entirely. Is a ported box of lets say 16Liters , is that WITH the port or Without the port? So one and the external volume of the port on top of the 16L? Thank you

I’m trying to understand your statement about placement of passive radiators in relation to the driver. Kicker and other companies have been making ‘truck boxes’ with the driver and PR on the same surface for many years. Theirs seem to work just fine set up this way.

What if the sealed enclosure was larger? I've personally tried a 18l sealed enclosure compared to an 42l sealed enclosure and the low bass output is significantly louder without any eq.

So what’s the best box

Could you make a 6th order with passive radiators?

As a drummer I am, I think the 4th and 6th order boxes are not for me, because I like to hear all the frecuencies of music, you know, I like to feel the deep sound of the 20 herz that the bass drum produces. What do you think?

Great Video though, would love to know who wrote that last song when you were testing in the car? lol

I need custom box like you have but need to be it smaller im looking at tops 8inch 600wrms or 6.5 400wrms i want loud and deep bass just for listening

You forgot to mention that a passive radiator usually makes the bass more accurate because of the pressure in the box