Sealed Subwoofer Box Design: Science and History of Acoustic Suspension

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Күн бұрын

For more Videos on the science and history behind subwoofers check out this video: • Hofmann's Iron Law: A...
In this video we learn abut the science and history of the humble sealed enclosure, called the Acoustic Suspension loudspeaker by it's creator Edgar Villchur. The leading minds of the time said that his design was impossible.
To learn more about Edgar Villchur check out these websites:
villchurblog.com/
edgarvillchur.com/
To listen to the man himself check out these videos.
• Edgar Villchur "Loudsp...
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Chapters:
0:00 Introduction
0:45 Villcher's Epiphany
2:00 Qtc
2:40 Three Examples
6:30 History of the Design
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Пікірлер: 190

@DIYAudioGuy 2 жыл бұрын

For more on the science and history behind subwoofers check out this video: kzfaq.info/get/bejne/d5-fiduVyauWd3U.html

@Vegas_Baba808 2 жыл бұрын

And... The answers I sought after was actually already outlined in the Hofmann's Iron Law vid. Thanks Justin!

@dreieinhalbeck Жыл бұрын

I did it. 0.704 in a sealed box with a single 15 inch. Volume? approx. 15 ft^3. Weight? 200+ lbs. Dimensions? 3.1 x 2.6 x 2.1 ft (maximum allowed space in my room that I cannot use anyway bc its a corner with desks on either side) Why? because it's fun building things, also I had to build something with a high efficiency because I am limited with power with my amp (not a fan of ported subs)

@2011joser 2 жыл бұрын

I have actually done back to back comparisons of sealed vs ported enclosures in my car using the same subs and amp. While the output of the ported box is much stronger, I am willing to give it up for the accuracy of the sealed box. Thanks for the history and explanation, it was surprising how recent the concept was.

@DIYAudioGuy 2 жыл бұрын

Not a lot of people are doing side by side comparisons like that. The only way to know which one you like better is to try them both.

@WesB1972 2 жыл бұрын

@@DIYAudioGuy I had 4 AR3a speakers and I would rather have ported JBLs any day

@robsorgdrager8477 Жыл бұрын

@@WesB1972 some like volume while others like volume and control . ☺️

@BabyCharlotteschannel Жыл бұрын

@@robsorgdrager8477 I like both, so a decent size, tuned very low, ported box is what I generally use in my vehicles.. and they ALWAYS sound awesome!! 😁

@2011joser Жыл бұрын

@@aaronmyers4951 I find it hilarious that it took you 13 lines to say that you prefer ported boxes.

@jameskyser9423 2 жыл бұрын

I love the sound of sealed enclosures.

@DIYAudioGuy 2 жыл бұрын

👍

@iceman45ification1 2 жыл бұрын

I've been running sealed enclosures for years. At the moment I'm running a single Savard Rap 12 in a 2.0 cu. ft. box stuffed with polyfill. It's being pushed by a 90's era PPI Power Class PC2150 bridged 4 ohms mono. It sounds amazing. It gets down pretty low too.

@DIYAudioGuy 2 жыл бұрын

That's a cool amp.

@BabyCharlotteschannel Жыл бұрын

Yeah, I remember the PPI amps being top dogs, along with the ever elusive Hifonics amps!! Those were legendary growing up!!! 🙏🙏

@iceman45ification1 Жыл бұрын

@@BabyCharlotteschannel HiFonics amps were bad to the bone!! I love all ZED made amps. 👌

@dilbeckskate 2 жыл бұрын

great video I loved the editing and the history thrown in

@DIYAudioGuy 2 жыл бұрын

Thanks.

@paulgood2218 2 жыл бұрын

Great video love the information !!

@DIYAudioGuy 2 жыл бұрын

Thanks!

@B15SDMDESIGNS Жыл бұрын

I've always ran sealed enclosures as I love the accuracy and quality of the bass. I got back into car audio recently and wanted to try a ported enclosure and in all honesty j wasn't really happy with the sound so now going back to a sealed enclosure.

@brycedupps8719 Жыл бұрын

Try tuning lower, play rebassed music and see if you like it

@Elliott-Designs 2 жыл бұрын

Sealed enclosures also typically have less maximum pressure on the walls of the box than ported enclosures! This means less colouration from cabinet vibration and/or less bracing needed. Also, unlike ported, you can line/stuff pretty much to your heart's content (or for the most part at least), this means less cabinet colouration and less cabinet reflections back into the cone causing some extra modes to develop in the cone, something you can't do too much to a ported enclosure due to efficiency losses. Gotta admit I love everything about sealed, 1 downside, less -3dB extension than a ported. Thanks for the vid Justin! Great explanations!

@DIYAudioGuy 2 жыл бұрын

I did not know most of that.

@Elliott-Designs 2 жыл бұрын

@@DIYAudioGuy yep, that's because in a correctly designed ported box, the air in the box at tuning is in phase with that from the cone. This means that at tuning you get double the pressure you do than with a sealed box. However below tuning the port just acts like a giant hole in the box which means really low pressure and is the reason for the steep roll off below tuning, also why the woofer loses control without a subsonic filter as there is very little pressure controlling the cone's movement below tuning.

@Elliott-Designs 2 жыл бұрын

Also, apart from suitable driver selection, I'm surprised more sealed subs aren't used in cars. That shallow roll off and cabin gain would result in a really favourable situation I'd have thought, and not to mention cone control down to 0Hz, so theoretically you don't need to care about subsonic filtering sometimes.

@Elliott-Designs Жыл бұрын

@@GTILOUD well... The driver has to be suited to a sealed enclosure in terms of its suspension (look at its TS parameters). Else you're going to either end up with 1 note bass or having to make a massively oversized box

@janbenschop7597 Ай бұрын

That's odd, that there is less pressure in a sealed enclosure than a ported one, since the port is basically a vent, which would release pressure.

@louiesipes2257 2 жыл бұрын

Not many woofers designed for sealed box these days, I personally like a sealed over ported or passive radiator. Tlines are another story. 😊

@DIYAudioGuy 2 жыл бұрын

True.

@Elliott-Designs 2 жыл бұрын

Unfortunately this is very true, GRS seem to be the only ones I can find, on loudspeaker database at least (for subwoofers). But yeah, transmission lines can be designed to handle any woofer really, you just adjust the mass loading of the line.

@gregkrueger331 Жыл бұрын

I really like my sundown sd3 10 d2. It’s designed for a sealed enclosure, in fact, they expressly say sealed only but it’s a pretty decent sub for what it is.

@janbenschop7597 Ай бұрын

You can extend the low end with roughly twice the woofer's cone area. You can also mass-load passives, which also extends the low end, though that reduces sensitivity somewhat.

@garygranato9164 2 жыл бұрын

good vid, thanks

@DIYAudioGuy 2 жыл бұрын

Thanks for watching!

@outlawGFXaus 2 жыл бұрын

This video was super interesting , you dont hear as much in depth detail with sealed boxes much....and to seal the deal youve shouted out Baba and El Fuego , 10/10 bro!

@DIYAudioGuy 2 жыл бұрын

👍

@Karizma231 5 ай бұрын

You mean you hear more detail with sealed

@msh6865 2 жыл бұрын

In the late 80' a pretty sizeable majority of car audio systems used sealed enclosures. But, at that time people still cared about SQ while trying to get loud. SQ was the driving for in car audio competitions then but, they also included a SPL component.

@DIYAudioGuy 2 жыл бұрын

The woofers were different too. Softer suspensions.

@msh6865 2 жыл бұрын

@@DIYAudioGuy higher sensitivity as well.

@mattnewbern4933 2 жыл бұрын

I'm building a 15.5 cubic foot enclosure for a pair of 18" drivers. It will have a removable external port with a block off-plate so it can be ran sealed or ported. Tuning can also be varied quite easily.

@victorfreeman5413 Жыл бұрын

Running an old school 90s jl audio w3 in a super sealed box when you push cone down it takes forever to come back up. I think ported is louder and more efficient but a good sealed box i think is better sounding and they can handle more power as well. Its just more accurate and it sounds the way you were intended to hear the lower frequencies in the music

@DIYAudioGuy Жыл бұрын

That means you have a good seal, no leaks in the box.

@Karizma231 5 ай бұрын

Yeah I agree, strange they use ported for studio monitors though.

@ABWSKITCHEN 2 жыл бұрын

After more than 35 years of buying, building and enjoying subwoofers, I have a Kerf subwoofer enclosure and closed enclosure with 10" Revel subwoofer drivers, with 1000 watts of power, there are lots of difference between both, which I have them working together. The closed enclosure give more precise sounds than the Kerf, which rattles the whole house.

@DIYAudioGuy 2 жыл бұрын

👍

@BabyCharlotteschannel Жыл бұрын

I can DEFINITELY appreciate having the different subs and boxes!!

@ceeweedsl Жыл бұрын

Anyone know how to size box when mfr gives one set of specs and loudspeaker database (+ others) gives very different specs. Example with mine is VAS of 22.3 vs 37 or Fs of 40 vs 33. Which is more reliable for sizing box? Is it possible this is the difference for broken in vs factory fresh?

@posford 9 ай бұрын

Hi.. I love your channel, very professional and very informative

@DIYAudioGuy 9 ай бұрын

Thanks!

@MadLadCustoms Жыл бұрын

I have two Infinity 1200w @ 500w each in two ohm total load (switchable between 2 & 4) They're stupid cheap at $115 each and sound phenomenal, highly recommend if you're looking to try the sealed route with decent amount of kicks that aren't overly abnoxious.

@DIYAudioGuy Жыл бұрын

Bang for the buck!

@BigGeorge3397 Жыл бұрын

What size box?

@julesbruchez-theartofgrapp9646 10 ай бұрын

I have the 10s and they are AWESOME!!!

@MadLadCustoms 10 ай бұрын

@@BigGeorge3397 0.9 cu ft per driver!!

@RichGurska Жыл бұрын

Back in the '80s I had a pair of Acoustic Research AR93 speakers.... I used to DJ a small halls with them

@DIYAudioGuy Жыл бұрын

I bet those things sounded amazing!

@tomkocur 2 жыл бұрын

Sealed + DSP = win. You'll just need a bit (a lot) more power. However it's worth it. I'm using Ultimax 10 in my home cinema with the very low end boosted to give a flat response from 25Hz and I wouldn't never return back to ported/passive radiator. 500W gives more than enough SPL.

@DIYAudioGuy 2 жыл бұрын

Cool!

@WesB1972 2 жыл бұрын

More than a little bit.

@janbenschop7597 Ай бұрын

That's Kloss (Henry), who later started KLH, which signifies KLoss, Henry. Later, he started Advent, then Boston Acoustics, then Cambridge Acoustics. My father bought a single AR2 and built a Heathkit tube amp to drive it. That was 1963.

@DIYAudioGuy Ай бұрын

KLH = Kloss, Low, Hofmann source: klhaudio.com/a-brand-reborn-klh-audio/

@mugendrewable 2 жыл бұрын

Have you covered band width efficiency product yet?

@DIYAudioGuy 2 жыл бұрын

Nope.

@blakebrockhaus347 2 жыл бұрын

One thing I think is funny is that ppl will say "progressive suspension sounds terrible, you need a linear suspension for a sub to sound good." And then say they love the way a small sealed box sounds. A sealed box acts like a progressive suspension. As the woofer moves in and takes up more airspace, the airspring tightens.

@DIYAudioGuy 2 жыл бұрын

Good point!

@sudd3660 2 жыл бұрын

as long as you use reasonable quality subwoofer drivers, and you leave a bit of air in the box after the driver is mounted. its all that is needed to get great sound. eq is a necessity for all subwoofers so woofer air displacement is the limits how low and loud it can play. small as possible box internal volume within reason is the easy way. no going in larger. watts is not a big deal. i made very small(18L) subwoofer with 10" woofer. 100watts amp and dsp to get it to 15hz. best bass i had.

@DIYAudioGuy 2 жыл бұрын

👍

@TheSFFV 2 жыл бұрын

Good video Justin. Where is 25hz to life, Koss ftw. AR used to be so good. What happened to them? I would rather the dynamic accuracy of the sealed even if it means losing some db's. I ran a triple MTX 10" sub box and the air space was only like .6 cuft net. Sounded great. Of course those aub could run in as little as .52 cuft. Subs that could run well in small enclosures used to be a thing in the late 90's early 2k's.

@DIYAudioGuy 2 жыл бұрын

Yep, trends shift over time.

@FSXgta 2 жыл бұрын

Great coincidence, I was just playing around in WinISD with sealed subs and cabin gain...

@DIYAudioGuy 2 жыл бұрын

Got to love that cabin gain.

@darrenpetersen384 2 жыл бұрын

Hey man, love the info 👌. Hope you could help me out with something....I bought a pair of 8' woofers a couple days ago, but they came with no specifications besides the power ratings. Is there a way, and how do I go about to determine the T/S Parameters of my drivers? so that I can get the designed on Winisd. Thanks once again for the great content 👍🏽 👌

@DIYAudioGuy 2 жыл бұрын

That's really odd! What do you know about them? Brand and model? I would advise doing what you're doing right now, asking everyone you possibly can. Maybe check out Toids DIY audio forums. If you can't find out somewhere on the internet and you might need to grab one of these. kzfaq.info/get/bejne/bM1jbLaUvNPFY4k.html

@darrenpetersen384 2 жыл бұрын

Found the info I needed. Thanks!!

@mpugne 2 жыл бұрын

Without buying something like the Dayton audio dats which if you are going to be messing around with speakers I highly recommend since manufacturer data is surprisingly bad. You might get lucky with a local shop who can test it for you try one that does a lot of custom work.

@BabyCharlotteschannel Жыл бұрын

@@mpugne good info brother! I didn't know about that, but glad I do cause I have a 10+ year old killer sub I saved for a year to finally buy, though the sale at part's express sure helped with that!! Anyway I really want to build the ideal ported low box for it, so I can FINALLY get all it's got to give out of it!

@twinturbotony93 Жыл бұрын

I have a single 18 in my car. I wanted ported but my builder said he couldn't build the box big enough for my car so he went sealed. Luckily the sub I have was rated to be able to run it sealed or ported.

@SirDella Жыл бұрын

I'm thinking of picking up a 10" for my diy amp, it's a class AB and only 30 watts I'm currently running two bookshelf speakers, tuned to 55hz, with a massive 18db bass boost, it's extremely boomy the cones move a lot but I can't hear anything below that, and when listening at high volumes, I'm barely sending +- 1v from the amp (max is +-17v) so, do you think that with that little power, a sealed enclosure and the EQ, I could hit maybe 25hz? at low spl levels at least

@DIYAudioGuy Жыл бұрын

Yes, the key is "low spl levels"

@SirDella Жыл бұрын

@@DIYAudioGuy Thanks!

@jimthvac100 Жыл бұрын

I wanted to ask about one of the differences between pported and enclosed speakers. I have been reading sealed speakers tend to sound more accurate and not "boomy". If a ported speaker that is designed with a flat response. and a similar speaker but designed with a sealed enclosure with the same low frequency response at 3db down (obviously with a larger enclosure). Is the sealed speaker going to sound more accurate as compared to the ported speaker described? Or is the ported speakers that are described as boomy simply just built incorrectly to sound that way?

@DIYAudioGuy Жыл бұрын

I prefer ported, if designed correctly they sound great plus the get lower and louder.

@L-Noble.YT_Hi.Res-Soundminds 2 жыл бұрын

My car audio is sealed, the hifi audio is sealed. My mind is sealed

@DIYAudioGuy 2 жыл бұрын

If your mind was ported that would be a problem.

@L-Noble.YT_Hi.Res-Soundminds 2 жыл бұрын

@@DIYAudioGuy It would be 😂. Thanks to you I enjoyed the video and learned something.

@Karizma231 Жыл бұрын

@@DIYAudioGuy 🤣

@Mr.peabody420 Жыл бұрын

how much are your services?

@robpayne2089 Жыл бұрын

Hi.. what's the best sounding shallow subwoofers? I have a 04' standard cab silverado. Sealed or ported?

@DIYAudioGuy Жыл бұрын

The best sound is probably something like this: howl.me/cjQpDci70UP but something like this is much more affordable and is a solid performer: howl.me/cjQpEVFFtxt You will probably have to go with sealed, not much room back there and ported enclosures need big boxes.

@robpayne2089 Жыл бұрын

@DIY Audio Guy thank you. BTW love your channel. Very helpful.

@Johnboy-of3vo 8 ай бұрын

If you like sealed and ported just build a 4th order thats what I did , made my 2 12's sound really good

@getsum8931 2 жыл бұрын

Nothing sounds quite a precise as a large sealed enclosure,

@DIYAudioGuy 2 жыл бұрын

Yes.

@Vegas_Baba808 2 жыл бұрын

@@DIYAudioGuy Which would provide better performance *AND* sound quality? A sealed sub box with 2-12" Subs? Or a ported sub box with 2-10" Subs? I am contemplating down grading from 2-12" CompRT's (500W RMS per) in a Soundbox prefab sealed box @ 1.48 cu ft air volume from Amazon (which performs really well, but I want more... lol) to a set of 2-10" Kicker Q-Class (700W RMS per) while using a Fox Acoustics 10" Ported box @ 2.1 cu ft air volume while being limited to having a mounting depth of 6.5" or less. Also contemplating the Fox Acoustics sealed box (also 2.1 cu ft air volume) for the 2-12" Subs I already have. Box Fox Boxes have the 5/8" Seat Riser Kit included. In either case, would adding poly fill be of benefit too? Survey says?

@DIYAudioGuy 2 жыл бұрын

@@Vegas_Baba808 Hard to say. If the 12s are in an undersized enclosure then switching to 10s could help.

@JoshM7 2 жыл бұрын

@@Vegas_Baba808 Sound quality can be subjective but I've found as long as you don't overdrive your subs, both sealed and ported can sound equally awesome. I'm satisfied with a single UM10" (Originally Sealed but now uses Passive Radiators) in my car. And two UM12s (Ported) in my house. The single 10" in my car is louder than my dual 12s so where the sub goes plays a huge part as well for both the output and frequency response. And I couldn't tell a difference between sealed or ported when I had the Ultimax 10" sealed and compared it to a ported 18. (Full Marty using a Ultimax 18) As for what would provide better performance, It heavily depends on what kind of output and low end you're trying to get out of the subs + how big you're able to build the box. If you're limited on space sealed might be your only option for a good balanced sound that can still play decently low. But there's also Passive Radiators that can let you get away with a smaller than a ported box and still have similar output. And still sound just as good as sealed. (Smaller than a normal ported box because you don't have to worry about port chuffing if you undersize the port)

@Vegas_Baba808 2 жыл бұрын

@@JoshM7 Agree about not over driving subs. The sealed box I have ends up sounding mechanical when bumping at 80% to Full Tilt Boogie (Trademark - Kip Litsey) for certain tracks (but it is not distorted due to clipping as the gain structure is set correctly across all Amps and the DSP) = it just does not sound natural or balanced when being played at very loud volumes. I was thinking a ported box with more cu ft volume would eliminate the mechanical sounding component. The problem may actually lay with the recording quality of the tracks that exhibit this mechanical sound, in addition to harmonic resonance of the subs unloading on the floor and rear cab wall. My truck is like an amphitheater, due to the massive sound dampening and insulation (100 Mil Kilmat and 150 Mil Noico Red) that was done front to back, top to bottom. The Epicenter effects is also all the way off, so that is not a contributing factor for these problem tracks...

@dlopezchampion8054 2 жыл бұрын

Was wondering if you had a recommendation. I just bought a AudioPipe TXX-BDC4-12D 12 Inch 2,200 Watt High Performance Powerful Dual 2 Ohm DVC. I am having a hard time figuring out what amp to pair up. It is in a Qbox single 12" ported. I was wondering what amp will push its peak without blowing the sub. Any suggestions?? Thanks

@DIYAudioGuy 2 жыл бұрын

That's going to be a tough one! Audiopipe makes some fantastic budget-minded gear. It's hard to get a better bang for the buck. But their power ratings are not accurate. Looks like the official RMS rating on that subwoofer is 1,100 watts. Looks like you have the dual 2 ohm version, so you want to wire the coils in parallel to get a one ohm load. So make sure that you pick an amp that is one ohm stable. This amp here might be a good candidate. kzfaq.info/get/bejne/a9aleKiFmqjUmp8.html Yes, call me your subwoofer can probably handle a little bit more power, but it has a clip light on the bass knob. So just watch the light and don't clip the amp.

@dlopezchampion8054 2 жыл бұрын

@@DIYAudioGuy So you don't have a recommendation of Amps that you think may complement the 12. You can give me 2 or 3 I am trying to get a good idea on what will make it sound its best. Currently it is on a old Blaupunkt I had but the amp keeps clipping. It RMS at 2ohms is 450-500, but that barely touches the subs 1100 rms capacity I was thinking something with 1200 rms to push the sub but not clip the amp and set at 75% gain

@DIYAudioGuy 2 жыл бұрын

@@dlopezchampion8054 I just gave you a solid recommendation. Here is another option: amzn.to/3xK1S5L

@DIYAudioGuy 2 жыл бұрын

Or this one: amzn.to/3OpkX3Y

@RYDRmotorsports Жыл бұрын

I’m looking for the best sql subwoofer that can get really loud in a sealed enclosure. I want to put 6 10 inch subwoofers under my seat in a 2018 Ford f150. I want 3 subs firing forward and 3 firing up. I have a 3.5 inch seat lift. Box specs is 53 length, front height 12.5, rear height 9.5 and width of 11. What subs should I get? I have about 3500 rms of amp power I’m working with.

@DIYAudioGuy Жыл бұрын

Sounds like your strategy is to maximize cone area. If so then you want to use these: howl.me/cjCkNNMBtL6 I am not sure if you want to go with the dual 4 ohm or the dual 2 ohm. You will need to do some math to get the impedance right.

@RYDRmotorsports Жыл бұрын

@@DIYAudioGuy correct. I want close to a 150 db set up and not just rap music. I want all music to sound good and move a lot of air!

@byronmccastle 2 жыл бұрын

Off Sub ject question. I have 2 sets of tweeter and the terminals aren't clearly marked with -/+, just a resistor would that be the pos or negative???

@L-Noble.YT_Hi.Res-Soundminds 2 жыл бұрын

I believe that would be pos+

@DIYAudioGuy 2 жыл бұрын

It's probably not a resistor, it's probably a capacitor. If it is then the capacitor is on the positive wire.

@byronmccastle 2 жыл бұрын

@@DIYAudioGuy Thank you, much appreciated. 🤙🏾

@thedubwhisperer2157 Жыл бұрын

No subs I have ever heard come close to the accuracy of a Qtc 0.5 sealed enclosure. Inefficient as hell, but with 6 x 18", 4 x 21", and ten power amps totalling 20kW continuous I'll live with that...

@DIYAudioGuy Жыл бұрын

Throwing a ton of power at will get the job done.

@JoshM7 2 жыл бұрын

I've tried Sealed, Ported, and PR and love them all. Sealed has its place but for me ported/PR is just better. A/B comparing a Ported UM18 to a Sealed UM10 heard no difference in sound quality. Only bass extension. I'm getting the itch to do Infinite Baffle in my car. I was going to put it off for a good long while. But I keep thinking about it these days. Either I'll use the UM18 I have laying around or try out a Fi IB18, or the big boi Stereo Integrity IB24. Leaning towards the IB24 because It can be built with Dual 2 ohm coils so I don't need to replace my amp. It only does 600-800w at 1 ohm and I'm pretty sure 100-200w will be more than enough power for 95% of the time. I hardly push 200w to my current box and the IB24 at 200w will be louder than the UM10 if it was using 500w. I need to stop thinking about it......

@DIYAudioGuy 2 жыл бұрын

Hard to make that IB24 fit.

@JoshM7 2 жыл бұрын

@@DIYAudioGuy Yeah. I think it'll fit in the spare tire area in my car though. I'd just need to brace that area really good. Cutting a hole in the car is the only scary part.

@tomkocur 2 жыл бұрын

I, on the other hand, wouldn't return to ported/PR where power is not a concern. I'm running UM10 in a sealed enclosure in combination with 500W amp - EQed to give me a flat response from 25Hz and that thing is way different than all the ported subs I used before. You don't even realize there's a subwoofer, that effortless lowend just comes naturally... But I know in some environments you won't hear much of a difference - had that too with sub in one corner, me in another one and no fancy AccuEQ advance like I have now in between. Any sub I tried, everything just resonated at 38Hz.

@JoshM7 2 жыл бұрын

@@tomkocur That's about the frequency my UM10 was good to when Sealed. I have 600w or so of power for it in my car. But Sealed it was lacking the really low stuff under that that I personally like. It takes up more space but ported/PR on it really does well. I use three RSS265-PR for my UM10 to tune to 19Hz. I get usable output to 16Hz in my car. And I mean windy usable output.

@benmiller5830 Жыл бұрын

i have a um18 replacing my rear seats and using the trunk as a box and would recommend. crossed over at 100hz and kills every single song. i really want to fit a 24 but its not happening :(

@Slaphappy-_- 2 жыл бұрын

Do you have plans for a 6x9 box for good bass?

@JoshM7 2 жыл бұрын

6x9 as in coax speakers? Most of them are made for open baffle and can have exceptional smooth bass if they are in the rear deck of a car. (Assuming you are talking about for a car) But they might lack the excursion to have tons of output under 50-60Hz. Better to just get a sub. A sealed sub using the right sub can shock you with how low it can play. My Sealed Ultimax 10" had really good output from 26Hz+ and could audibly play to 15Hz (no harmonic distortion which surprised me) while shaking my cars doors with the pressure.

@DIYAudioGuy 2 жыл бұрын

I do not. There aren't a lot of six by nine inch subwoofers out there on the market, tons of coaxial 6x9s.

@fasterthanaturtle 2 жыл бұрын

I don't think this should be that hard but I tried many times to get win isd and there is so many things claiming to be it. Most looks like spam. Is there a reputable website? Thanks

@DIYAudioGuy 2 жыл бұрын

Linearteam.org

@robertweekes5783 Жыл бұрын

Are sealed enclosures similar to passive radiator enclosures?

@mannypvd2296 Жыл бұрын

no. passive radiators is like having a ported enclosure.

@tatsumaru12345 2 жыл бұрын

Infinite baffle video one day? Not really for suvs. But smaller cars/convertibles, could be useful! Tried it once, but it needed so much DSP work. So I stopped worrying, and love some 1/2" mdf ported boxes.

@DIYAudioGuy 2 жыл бұрын

That is a good idea.

@JoshM7 2 жыл бұрын

A Infinite Baffle video would be cool. I may do one in the near future if I keep getting tempted by the idea of saving trunk space and keeping my already good bass response under 20Hz. my 10" plays to 16Hz with authority but it does use up a bit over half the trunk space. I expect the Infinite Baffle sub to have almost no bass above 55Hz due to my trunk acts like a lowpass/brick wall at 55Hz. But I could add a smaller ported box for 55Hz-100Hz that sits just about snug up to the back of my seats in the trunk.

@WesB1972 2 жыл бұрын

I bought 4 AR3A in 1974. Great speakers, sounded fabulous but were very inefficient and were incapable of absorbing much amplifier power. I had these speakers in a large open party room, driving them with a Dynaco Stereo 400 amplifier. I fused the speakers as specified by AR and I blew many fuses while using them for parties with lots of people. I eventually removed them from service and replaced them with 4 ported JBL speakers with more power handling capacity. The ARs were true sounding speakers with tight bass but were not suited for parties. With the JBLs you could feel the bass in your chest.

@DIYAudioGuy 2 жыл бұрын

Yeah, those definitely weren't party speakers.

@tommyK7282 2 жыл бұрын

To me it makes more sense for a sealed enclosure to be bigger.

@DIYAudioGuy 2 жыл бұрын

I modeled several sealed enclosures in WinISD when I was prepping for this video. There is a threshold, once you get bigger than that threshold making it bigger does not change the response much at all.

@DIYAudioGuy Жыл бұрын

@@GTILOUD I tend to build a bit bigger than the manufacture recommend specs. Bigger boxes play louder.

@pakmanmoore4255 2 жыл бұрын

so where can I get this speaker at and how much????

@DIYAudioGuy 2 жыл бұрын

Are you looking for the original AR speakers from back in the day? You can find them on eBay.

@abahlul6461 Жыл бұрын

How to made with passive radiator membran?

@DIYAudioGuy Жыл бұрын

kzfaq.info/get/bejne/rJqidM6pyNGWj4U.html

@A6Legit Жыл бұрын

1:04 they were just rollin around with speakers in open air? Lol

@sermac3246 2 жыл бұрын

👍

@DIYAudioGuy 2 жыл бұрын

👍

@BlackCollarFab Жыл бұрын

Question. When you look at the specs of a sub, you find a sealed box recommendation for 1.5 cf. Also, it will say the displacement, in this case .43. So do I build a 1.5 box. Or a 1.93?

@DIYAudioGuy Жыл бұрын

Yes, but most subwoofers don't list that spec.

@tjaprilgage Жыл бұрын

Yep. You wanna include the sub displacement for the best sounding box.

@iyona14granturismogt6gtspo7 Жыл бұрын

I'm running a 21" Pierce Audio 6000watt RMS Subwoofer in a Sealed Enclosure powered by 2 Crown XLS Drivecore 2500s! Need Seismic Earthquake measuring device to quantify. 136db easy.

@DIYAudioGuy Жыл бұрын

😱

@A6Legit Жыл бұрын

4:33 😆

@joeyjojojr.shabadoo915 2 жыл бұрын

For home, Largest Sealed enclosure while keeping xmax in check...... exactly. For car unfortunately, I love small single driver 4th order BP....a product of a lack of a trunk, in the hatchback days and now again in an SUV.

@DIYAudioGuy 2 жыл бұрын

👍

@davidfromamerica1871 2 жыл бұрын

I guess it depends on how you personally want the sub to perform for you. Do you want subwoofer bass or just want old fashioned bass..?? Subwoofers can do either or to your choosing by setting the hertz frequency response. 30 hertz, 25 hertz or 20 hertz. etc. Subwoofer is actually a large speaker woofer if you want to use it that way at 20 hertz setting. It leaves out the sub frequencies and only hits the bass note hard, powerful and very tight. Great for listening to classical orchestra music and old fashion rock & roll.

@MullinPerformance 2 жыл бұрын

Justin taking us to school on Sunday.

@DIYAudioGuy 2 жыл бұрын

They call me the professor of bass for a reason.

@Vegas_Baba808 2 жыл бұрын

@@DIYAudioGuy Preach it Professor! 💪🏽🤘🏽🔊🔥💯

@UniCrafter 2 жыл бұрын

I did the derivation for the equation for a sealed sub box, was a pain in the ass, and is only accurate to WinISD 80% of the time. Seems to freak out with some high Qts/high Vas drivers, but not others. I'm pretty happy with the equation though, so I may even just buy a few subs, make a few boxes, and see how accurate it is in reality.

@DIYAudioGuy 2 жыл бұрын

Yea, I was looking at the formulas -- might do another video with more math. Not easy stuff.

@Clobercow1 2 жыл бұрын

I think discussing box Q is just as important as the speaker QTS, with both we can predict response with the box. Also, the `tightness of bass` in a sealed box isn't because of the box, it's because of the total Q of the system. Put a woofer with a QTS above 1 in a sealed box, and the results are not going to be good, ever. On the other hand, if you take a woofer with a very low QTS and put it in a small sealed box, you get also a poor response. So, the box combination depends on the woofer design just as much as the woofer design depends on the box design in relation to the design goal.

@DIYAudioGuy 2 жыл бұрын

Yes, you got to match the box to the driver.

@gillmoretiendalli5455 2 жыл бұрын

Hey help me please im want the size of the box for a woofer that a wanna buy this one GRS 12SW-4 Subwoofer Please D×L×H

@DIYAudioGuy 2 жыл бұрын

Anything that will get you about 1.5 cuft.

@nagyandras8857 4 ай бұрын

now hold on , that is not so simple. some drivers work best in a sealed box, others work in reflex box better. it has a lot to do whit the design of the driver. drivers ment for sealed box do indeed manage to get all that deep bass people are looking for. allso, they got a way nicer rolloff. and group delay -winisd can show that too- is usually better. ported designs in a limited passband can outperform in that regard , i have to mention. however, sealed subs lack ports. now why is that important ? port noise. allso the port is actually radiating sound too, that will interfer with the sound from the speaker cone. that creates a lot of unwanted events. its getting harder to find drivers that where designed for sealed boxes, indeed true. but, they still do exsist, and they give a whole new level of clarity. some of them do manage it in a relative small box, compareable to the size of a ported box. EBP = fs / Qes , if its less than 50 then its generally to be used in a sealed box. this parameter alone does not tell the whole story, but its a good guideline. over 100 will not quite work in a sealed box. the driver you show in this video is clearly not ment for a sealed box.

@markwentz8332 2 жыл бұрын

Had a Stereo Integrity HST-15 mkII in my Ranger and damn! i heard low notes in well listened too music that i had never heard before!!! (three short clips on my channel)

@ogairbender808 2 жыл бұрын

.707 known as the Goldie locks Q

@DIYAudioGuy 2 жыл бұрын

That is the one.

@sanchoc4860 2 жыл бұрын

I put sealed for what I have but have 2 isobaricly loaded 15's

@DIYAudioGuy 2 жыл бұрын

That is still sealed, if it's sealed.

@ogairbender808 2 жыл бұрын

I'm a sealed kinda guy

@DIYAudioGuy 2 жыл бұрын

Cool!

@angsieverz4938 2 жыл бұрын

Sealed designs are " transient perfect", and more evident with larger diameter pistons. Hence subjectively is cleaner and accurate. No doubt the timing of rendering the lower octaves always keep up with very demanding passages.

@DIYAudioGuy 2 жыл бұрын

Yes. Lots of cone area!

@georgeogrady449 Жыл бұрын

80hz build in amp speaker run car audio

@7thsoneli Жыл бұрын

Sealed subs for me,transient response matters.

@DIYAudioGuy Жыл бұрын

A lot of people feel the same way.

@7thsoneli Жыл бұрын

@@DIYAudioGuy Fell in love with my AR48S speakers in the seventies,a true 3 way the mid was enclosed! I now own ported pioneers fs51 fs 52 and a few lr22 bookshelf. but I use sealed subs in my home and car to do the bass,crossed over very low both in car and home. Keep up the good work!

@samizdat113 8 ай бұрын

I prefer sealed boxes.

@Lesterandsons 2 жыл бұрын

Closed boxes requires special drivers you no longer find

@DIYAudioGuy 2 жыл бұрын

Yes, most modern drivers work better in a ported enclosure -- sealed needs a soft suspension so that the air spring can do its job.

@HashDogg06 2 жыл бұрын

@@DIYAudioGuy I can remember Pioneer doing a F version of their subs in the late 90's for car audio, these were designed for "Free Air" installs where as the C versions (most commonly used) were suited for sealed & ported. I could never workout if the F version used stiffer or softer suspension as i never managed to get my hands on one to compare.