I often add 2 new holes to die cast speaker frame flanges, tapped number 10 fine machine screw threads.. They can accommodate 'holding' screws used as handles for mounting, or alternately, as jacking screws to lift off the driver frame from an enclosure after time has passed and they 'stick' in place.
Because of this video, I ordered a dual 4 ohm voice coil 21 inch custom built Pierce Audio 4K (4000 watts RMS) Subwoofer ,that will be powered by 2 Crown XLS 2500s,one on each voice coil!
Nice build and finish man. IMHO for any box that you can't pick up by yourself, installing roller casters is a good idea. Helps a lot with positioning and even housekeeping, cleaning, redecorating.
My 15inch sub weighs 90+lbs by itself, i had a double layer 3/4inch birch box for it wich added another 150lbs to it. It was a paint to move around. It also only had 8 screw holes but i drilled them out slightly so i could use large full thread spax screws.
Nice overview on those. Like your content man. I just ordered some SI 24s myself and can't wait to get them installed! And no, my wife is not particularly happy about it either haha
Hey man, actually had a question for you about the 1299s I'm getting ready to build. I "mentioned" you over at AVSForum, but those are easy to get lost down the rabbit hole... Is there a good way I could contact you about a few quick questions? Please let me know if so. I'm Blister64 over on the forums. Thanks!
Love you attention to detail on the enclosure. MDF can be somewhat tricky when it comes to finishing. Appreciate you taking the time to do it perfect. Nice video and have also been thinking about adding a PAP 24" in my truck for an somewhat SQ build (basshead at heart, so not quite full on SQ! lol).
Both shoulders dislocated ouch I dislocated my right shoulder 14 times and had three operations on it so I know how bad it hurts when it goes out. Glad you feeling better now and enjoyed the video. Take care Ryan post videos when you have time it’s summer
Eng- 399 ah, man, that sucks. Does it hurt less each time? This is my second time for each arm. 12 years ago I did both at the same time. I dont want it to happen again cause the doctors warned me about surgery. No thanks. Buy gott keep enjoying life so not sure what to do. I love mountain biking, but its really high risk.
Impulse Audio the last time I dislocated my shoulder and had surgery was around 10 years ago at work falling down a ladder... long story... it hurts the same each time when it goes out and seems like the bone sits in a nerve and sends shorting pain down your arm and the rest of your body. Now they put you to sleep but when I was younger they just gave me laughing gas when they put back in. The last operation worked and so far my shoulder feels great. Now I try to be extra carful because of having kids and wife mortgage payment ect ect just like you we need the pay checks to keep coming in lol.
Eng- 399 ya I don't want to go through that. They put my out with this stuff that knocks you out for 2 mins or so. Then they wake you up. I dont even know I exist while I'm out. Feels so much better when I wake up. Instant releaf. Dont want to go through it again though.
I feel your pain that's an awesome build glad to see your using pink insulation I did the same to my custom built altec 15 in WF w/ alnico mag and fostex comp horn daul ports back in the mid 80s still own them to this day updated cross/caps & need to be careful not to overload with insulation but I don't need to tell u I have used a sealant called butyl stripping all kinds on the market around the woofer thin not heavy reduced cab resonance dramatically I envy your desire I'm learning from you
Flip the subwoofer facing the wall, the suck out should end up being 3rd order then you can just place a absorber at the wall that is causing the SBIR or room mode. And if I had subs that large I will crossover it over around 120hz, get biggest slam possible. But yeh, I'm not the expert and maybe your using it for movies not music.
They look great and it's a very nice build.. I've never elected to use fiberglass insulation because the fiberglass particles have a tendency to move around in the enclosure and work their way into the spider and eventually get into the voice coil potentially causing issues later on.
Almost Zen I hear this a lot, and yet I’ve never seen a real world example of it actually happening. If the speaker is ported I use grill cloth inside the enclosure and staple all the insulation behind it, just in case. With sealed though I don’t bother.
hi bro i have watched all your work on you tube and i can say i wish i new just 10 precent but i read a whole lot about the subject and never seen your opinion about time aligning issues which says the tweeter sound reaches the listner way ahead of the sound of the woofer which makes it some times out of phase thats why some manufecters tilt the speaker back to correct it or put the tweeter back in a parllel position to the woofers voice coil to make the sound time correct not just phase correct....i wonder whats your opinion on this thx
Hey, good question. Time alignment and phase are different, but closely related. I believe getting phase correct is very important as it affects the frequency response significantly as well as the vertical polar response. These are very important. Time alignment, meaning if the sound from both drivers reach you at the same time, is less important even though it sounds like a very big deal. Time alignment is often said to be important because it's easy to understand and sounds like a really bad thing. Fortunately, by correcting phase during XO work, time alignment often happens naturally. This doesn't happen with a second order XO which is why some people recess the tweeter or slope the baffle back to time align. What they're doing is really no different than fixing the phase, but calling it time alignment sounds more special.
hi so what i can get from you is: using different slopes for the tw and mid might help with the issue and you say 2nd order might be a bad choice when it comes to time alignment ///will 1st order be better ?
nice build ..I have 1 IB24 from SI on the same XLS amp - it puts my dual UM15's to shame in every way and because its mounte IB , the SQ is phenominal and doesn't have nearly the rolloff below 20hz that your sealed box has...
Yes IB is a very good way to go for large drivers like this, but this one would have a steep roll off regardless because of the high Q. Also, the owner couldn't go IB, so we made the enclosure as large as possible.
Was the bass ass impressive as you expected? I've done LLT with 15s and one with a single 18 and the amount of base is incredible. Haven't tried sealed tho
Yes I was really impressed. I really want to get some 24s again, but space is an issue. I like the really low bass that extends forever. Ported LLT is a more violent eye rattling bass. This was more natural with lots of head room. The navy missiles in hacksaw ridge rippled my ribs.
@@ImpulseAudioSpeakers I had my house windows flapping which was distracting and stuff feel off shelves in the other room. I was running Crest audio CD 2000 amps. Maybe not really main stream, but they worked well for me and are reliable. 15 years later still working.
How did you connect the wires to the speakon plate? Solder,quick disconnect? If you used the quick disconnect, what size did you use? .187,.205, .250? Thanks
Here is the problem I have with that box. It's more than math. Years ago, the then-awesome 15" TC sounds sub driver was way too much for a 1" thick baffle enclosure. The (now closed) VMPS speaker company made it's "Very solid sub" from a 2" thick baffle box with bracing. So did Triad- but with even more bracing. Anything less, and the enclosure would just rattle and hum. The 15" sub was about 225lbs with enclosure.
Wow impressive subs. Only thing I would have used is T Nuts to keep the woofers snug and make tightening these a bit easier. But otherwise yeah, those subs are insane. I noticed your room correction system. Is that REW, or Dirac. I know sweep tones are similar.
XxSrelhowxX I’ve never heard of that ever happening. Only people claiming it does. Modern insulation is much different than the old stuff. Not nearly as friable.
@@ImpulseAudioSpeakers I'm familiar with product. Most cabinet companies use that to paint kitchen cabinets. I've done some touchups with it and it's really difficult to work with. Thanks for the info!
ken cohagen where do you live? I’m in Canada, but if you’re in the US you should check diysoundgroup.com for kits. If you are in Canada we could talk about it but it’s not something I normally do. I’m in the middle of a few projects.
I would have thought this amount of bass is really only suitable for commercial size cinemas or at the very least large dedicated and incredibly well isolated home cinemas. Also, I would think if you have to much pressure change from the bass in the room it's going to damage your hearing if not your body.
MaZEEZaM might damage your hearing, but it sure is fun :) Not as crazy loud as you’d think. Very realistic bass. No distortion at all. Sounds so clean compared to what we’re use to hearing. And most hearing loss studies suggest loud low frequencies are less harmful to hearing as midrange frequencies.
john o'neill glad you found it. Ported would have had to be very big to be tuned right. Also, sealed gives you better low frequency output when it gets very very low, like 10 or even 5hz. That’s the stuff you feel in some movies (not all). Ported is better in the 20hz range and for most people ported is the best choice. In this case the owner wanted the boxes as small as possible.
Sounds about right. Those amps can be used for home audio, but are really for DJ and PA applications. There are several videos on YT recommending them for home use. It's sad that people are believing them.
Graham Bond good catch. Stuffinh does very little for a subwoofer, unlike a typical woofer with a bandwidth up to +500hz. It does help tame high Q and smooth out that inductance hump and does help absorb any internal reflections at higher frequencies. Even if the XO is set to 80hz or so, there is output from the sub up to 200hz or so. Not sure anyone could ever hear the difference between stuffed and not, but can't fathom not putting it in there.
I can’t recall what I said in this video, but generally a sealed roll off will blend with room gain to give a very flat response down to single digit frequencies where as ported has a steeper roll off below the port tuning. In an anechoic condition ported will be flatter down to the port tuning only.
@@ImpulseAudioSpeakers omg thank you for the immediate response, this is the opposite of what I thought...most subs are dual .5 ,1 or 2 ohm subs ,why is this if 8 ohms better?
@@iyona14granturismogt6gtspo7 a lot of subs are low impedance so that you have the option of drawing more current out of the amp. Especially in car audio. If the amp is comfortable at 2ohms, better to use 2ohms instead of 8ohm so you get more current draw (therefore power output). But if the amp is a bit unstable at those powers then it’s better to use 4 ohm or 8ohm. So not necessarily better, just a matter of most suitable.
@@iyona14granturismogt6gtspo7 halving the impedance draws double the current therefore double the power (watts). But a lot of amps can’t handle this and will get hot or blow fuses.
What an absolutely monstrous subwoofer! Yet you place it in a SEALED box and run it off 8ohms..... That’s like owning a Ferrari and keeping it restricted to 60. 2 of the buggers though in your living room must be thunderous
Don O Chetti I did 4 ohms because the alternative was 2 ohms. When the amp is bridged, 8ohms acts like 4ohms, sorta. And sealed to to get as low extension as possible. These things go way down into sub-10hz range. It is pretty awesome.
Hey man nice vid man but i have a few questions regarding the behringer inuke and that is how does it compare to the crown amp based on power, SQ, heating and finally reliability? i am asking cause i am currently saving to buy the behringer inuke 6000-4U which is two behringer inuke 3k's in one case and since my build consists of 4 X 15 inch speakers i want to have enough power atleast decent sound quality and reliability my build is more for loudness but still. Amp: Behringer Inuke 6k-4U Mids: 2 X Hybrid Audio PLB 15 2 way speakers 2X340watts RMS(AES) these are great mids ive Dj-ed with JBL ,wharfedale , behringer ,RCF and more mids and these are by far the best for their price only mids that beat these out is the CVR 15's from china and the higher grade powered Jbl's vivaafrika.co.za/hybrid-plb15-mkii/ Subs: 2 X Targa Venom 15 D4's 2500watts Rms each(i will run them on 400-1200watt's for now) These subs are the loudest yet still musical subs this brand provides i am putting them in a 40hz tuned enclosure they have run up to 155DB Using only two of these subs. www.soundmatch.co.za/Products/Product/3334/targa-venom-10000w-dvc-4-15-subwoofer if you read all this i would love to hear what you think about the behringer amps i feel they are fine if you are new to home audio as i am i am a Dj but to me that is a different world.
Erik Britz as a DJ I’d probably trust the Crown more but that’s not based on a bad experience with the berry. Just a history of good success with Crown. For home theatre the crown is dead quite and the fans rarely come one. The berry is loud. The crown also has rca and the panel lights can be turned off. It’s a nicer amp. But if you’re not worried about the behringer reliability (and there’s really no reason you should be) then for DJ work the berry is nice because it’s 4x.
Thanx man yeah the behringer i will use for a limited time for gigs but will mostly be run indoors at home for watching movies etc. i just want some power i currently have those same speakers on 200 watts and that is not sufficient for me and also puts my speakers at risk due to clipping so rather get some power and a decent amp later on i will upgrade to crown etc.
You measured the coils in parallel and built the box based on that but the install was in series. Don’t the parameters change based on the wiring of coils?
James Warren a little bit is all, but with a sealed box it actually measured very little what the parameters are. With a subwoofer like this it’s basically build as big as you can then EQ the rest. There was no way the box design was going to achieve a Q below 0.8 anyways. But ya, doesn’t really change all that much regardless.
I remember back in the expensive days of LEAP and LMS designing sealed on the back and vented on the front (I'm not sure what they are called these day) enclousures and the wiring would make a big differeance in tuning and chamber sizing. I definitely want to say thank you for posting all the videos, I know it must be very time consuming! Keep up the cool work and stop getting hurt:)
my brother how much this speaker costs what he does not listen and I would like you to have a video where he listens to the power of this speaker's bass I wait for your answer
wow i would've thought the 24 inch sub could hit 10 Hz without sweat. sorry to say but that that near field response is disappointing even if it is closed box. 10 inch can do better than that. does it have super high FS? something is not right....
WV591 well first off, no a “normal” 10” sub can’t do better than that. Second, no a 24” sub shouldn’t be flat to 10hz in a closed box. Large sealed subs like this rely on a roll off that matches room gain. This is very normally around 30hz in my experience/research. Lastly, it’s important to take the FR shape with a grain of salt. What if I had told you that the response was at 120dB. You’d then be impressed. But I didn’t include the sensitivity so you don’t actually know the ultimate performance of this sub. You just know that the shape will require extensive eq and ample room gain. Overall the sub performed quite well, but do wish the shape of the response was easier to work with.
i wish you good health by the way is it possible to combine different slopes on a midrange? lets say 6db hp and 12db lp ie on the same driver do you do it some times ?or is it not allowd thx
גד אור thanks. Yes you absolutely can mix slopes and I do it often. The drivers usually integrate better with different slopes. This should be done based on measurements and XO modelling. Good luck!
Hello man I am french I follow your videos and I saw some of your posts on avsforum are you BassthatHZ ? I bought a Lab Gruppen FP14000 clone amplifiers and I am searching for two of these pierce audio 24''. I think I found them on alibaba (jld audio SAB24) but it is 600$ shipping each. How did you get them ?
Michel CAYUELA no I’m not BassThatHz. I go by tuxedocivic on that forum. These subs came indirectly from Pierce Audio in Washington. He has a website and email. They’re not as cheap as the Alibaba subs that bassthathz purchased.
Dominic DiClemente haha haha. How many views would that get me :D I did measure a huge 15” cab on a ladder the other day. You’ll have a good laugh as me and a friend sure did!
Terry Boyd hi Terry. I don’t do many custom builds. And shipping doesn’t make much sense on something this big. I can be reached at ryan@impulseaudio.ca if you like. I’m not very responsive though.
Richard Givher it’s probably comparable to the big PSA or JTR subs. Probably better than the smaller SVS. Size is very important when it comes to subs. The V3611 wouldn’t be my choice due to the height being double the width. But dual 18s would almost keep up to a 24.
@@ImpulseAudioSpeakers So the single 24 would go deeper and produce more output than two 18's? I'm just getting into this stuff and there's a lot to learn, so forgive my naivete.
Richard Givher no problem. Ask away. Yes in general a single 24 has more capability than 2 18s. Two 18s have some advantages, like two voice coils to handle the power, 2 wiring configurations (more if each driver is dual voice coil), if in separate cabs they have more placement options, etc. But in terms of output the 24 has a larger radiating surface therefore more Vd (assuming xmax is the same for the 24 and 18).
Aguilaverde Fly eagles I can’t remember exactly but I think $900 Canadian ($450 each). He prepurchased the drivers and amps. I just built and supplied the custom cabinets.
That is an amp issue. That response compared to the Behringer is a typical Crwon thing unfortunately. Get a Lab or Powersoft if you can swing it, or get an MC2. Crown has not been very good ever since Harman took over.
@@ImpulseAudioSpeakers Yup. Btw, I've done quite a bit of testing with box dampening materials, and one thing I found is this. The pink isolation does not have the same properties as poly-fill. Yes it dampens the box so it becomes less boomy, but it does not offer the isothermal properties of poly-fill. When I used the pink stuff in the same amounts or less, as you would poly-fill, the response of the speaker did not really change. And if I overloaded the box it acted as a much smaller box. I think it has to do with the density of the materials and their ability to couple with the vibrations. When using the correct amount of poly-fill the difference was significant. Then it had the desired effect of cheating the driver into acting like it was in a larger box. For a box that size, it can only handle about 1 lb. of poly-fill per cf3. Any more than that, and it actually starts to take away enclosure space. Try it. You'll be pleasantly surprised.
Vlad Lucian it’s because the mic on the camera can’t pick up bass that low. And then your speakers would have to reproduce it. Mostly the mic though. There’s really no good way I could do a proper demo of these things on RU-vid.
@@ImpulseAudioSpeakers It should be able to pick up some kind of depth. It doesn't even sound like the subwoofers are on. And it's no problem on my end, I'm using some skullcandy earbuds (Don't judge. They were cheap and they actually sound half decent) which we all know have no problem in the bass departament. By the way, I'm sure the subwoofers are amazing. Certainly better than what I've got. I'm just saying the demo was bad.
Vlad Lucian it’s really hard even for a measurement microphone to pickup under 30hz. My measurement mic needs about 15db of correction at 20hz. These are low bass animals and really the recording losses a ton of bass. I don’t have the response plot for my camera mic, but I do for many other mics. Don’t forget that bass demos on other channels often let their microphone clip really heavily and they end up recording harmonics. So if they play a 30hz tone the recording will have a lot of 60hz second order harmonics. This makes the listener think there’s a lot of bass in the demo because the 60hz tones are recorded. This setup is so clean that no false harmonics are recorded. Something to keep in mind when listening to other demos.
Zeth Spurlock stripped? No that didn’t happen. In total there were 24 large screws in over 1” of mdf holding in the driver. I am not concerned. Only installation of 8 screws were shown in the video.
Zeth Spurlock if only using 8 then it’s not overkill. Probably necessary. But this driver basket had two additional spots on either side of the mounting locations to add screws. I had to drill the frame at each spot, but it was possible. Other frames don’t offer that opportunity so bolts are a better choice.
