HS-24 mkIII build - Page 3 - AVS Forum | Home Theater Discussions And Reviews
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post #61 of 110 Old 07-26-2019, 08:57 AM
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I saw on the Facebook group that he has the drivers and has it installed. I believe he just hasn’t gotten around to the fun stuff yet.


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post #62 of 110 Old 07-26-2019, 10:18 AM
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Wow if he has them already that has to almost be a record. Most i know of took 3 to 4 months to get them.
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post #63 of 110 Old 07-26-2019, 06:33 PM - Thread Starter
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Sorry for the lack of posts, but unfortunately there has been nothing to report till now. The driver is installed and the build is finished. Nick sent them out Wednesday, and I had it in the cabinet Thursday night! incredible. The SEFL distribution center is down the road, so I picked it up after work Thursday evening. I haven't had a chance to really push it (I'm scared) but so far it sounds great. You know those songs that have those hidden lows you can barely hear...well they are no longer hidden. Even at very low volumes it moves everything in the house close to tune.
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post #64 of 110 Old 07-27-2019, 08:58 AM
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What did you end up doing for cabinet volume and port tune? Also what are you using to drive it? Not sure i saw that in the thread. Thanks. Looks like it turned out great. I can't wait till i get to hear mine some day.
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post #65 of 110 Old 07-27-2019, 11:09 AM
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Turned out incredible man, very well done! And yes, not much is hidden with those suckers lol. Also interested in what amp you are using
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post #66 of 110 Old 07-27-2019, 07:45 PM - Thread Starter
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Quote:
Originally Posted by Randy_J View Post
What did you end up doing for cabinet volume and port tune? Also what are you using to drive it? Not sure i saw that in the thread. Thanks. Looks like it turned out great. I can't wait till i get to hear mine some day.
The net volume is 19.64 ft^3, tuned to 17Hz. It's a dual 2ohm configuration powered by an NU12000 with no DSP. We had a small impromptu GTG with a few guys from the Florida area. It was fun walking around the house finding all the noises and nulls. On one song, it even vibrated the cats water bowl in the kitchen, sitting on the floor. That's impressive, considering my house is on a slab. So far the best song for "demo" purposes was Baby Goth, Gleamy. It hits the sweet spot, and pushes the driver to it's physical limits. I'd have to say that the driver lived up to all the hype. My house has an open floor plan and has a pretty large common area, it pressurized the room with ease. You could feel your cloths moving on your body in many places around the room. The area directly in front of the driver, about 4' away is exhilarating. Stand there too long and you'll start itching. My mains are Klipsch KLF30s, so it matches very well crossed over around 70Hz. Thanks to @chadsmith013 @ian#77 and @filtor1 for coming out. As a side note...To anyone familiar with the UM18s. I had two UM18s in mini marty cabinets 8.5 ft^3 tuned to 16Hz on an NU6000DSP amp before I built this. The HS-24 absolutely walked all over that setup. I have four UM18 Full Marties in my theater, 11ft^3 tuned to 15.5Hz on two NU6000DSP amps and four SP1804s in a 12cu^ft nearfield cabinet tuned to 27Hz,/ two Buttkickers On an NU6000DSP. The living room with the HS-24 is very close to the overall volume and pressurization of the theater.
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post #67 of 110 Old 07-27-2019, 07:48 PM - Thread Starter
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Originally Posted by blister64 View Post
Turned out incredible man, very well done! And yes, not much is hidden with those suckers lol. Also interested in what amp you are using
Thanks Blisters, I'm very happy with this build. We were talking about your room today while we were listening to some demo material. I can't imagine what three of these things are like in one room.

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post #68 of 110 Old 07-27-2019, 08:43 PM
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I appreciate you opening your home for a demo today. I had a great time. The 24 lived up to the hype for sure.
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post #69 of 110 Old 07-28-2019, 05:32 AM
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Thanks for letting me over again. Im very excited and nervous about doing mine now. By the way, the pics of that box do it no justice. That thing is beautiful.


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post #70 of 110 Old 07-28-2019, 09:05 AM
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It 8s insane to think that 1 sub is capable of keeping up with 8. Especially when you are going from a theater to a open floor plan house. I sure wish i could get mine up and running, but i need to finish the addition and remodel on the new house first. You are tempting me to try ported though. So are you feeding the whole amp in yo the sub or just 1 channel. Great set up looks lije it turned out awesome.
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post #71 of 110 Old 07-28-2019, 10:58 AM
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Originally Posted by tarponater View Post
Thanks Blisters, I'm very happy with this build. We were talking about your room today while we were listening to some demo material. I can't imagine what three of these things are like in one room.
I can't either yet! lol... I was thinking the same about your ported enclosure vs my sealed. I bet that has some crazy output. I'm finishing up a few other things then I should be able to get the other 2 boxes built and all 3 painted. Then I need to get some measurements done. Would be interested to see how yours measures as well when you find the time.

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post #72 of 110 Old 07-28-2019, 05:22 PM - Thread Starter
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Quote:
Originally Posted by Randy_J View Post
It 8s insane to think that 1 sub is capable of keeping up with 8. Especially when you are going from a theater to a open floor plan house. I sure wish i could get mine up and running, but i need to finish the addition and remodel on the new house first. You are tempting me to try ported though. So are you feeding the whole amp in yo the sub or just 1 channel. Great set up looks lije it turned out awesome.
If you only have one HS-24 and have the room for a 20 cu^ft cabinet, I would highly recommend you do it. As for the amp, both channels are running the driver. It's a dual 2 ohm configuration. I have the gain set at the third from last dot. So far no bad smells or excessive dust cap heat as long as the third light just flickers every once in a while. I've been pushing it hard today. Even though this is a strictly 2.1 system I did play some of my go to movie demo material. Irene is insane. She flexes like she's trying to get out of that cabinet.

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post #73 of 110 Old 07-28-2019, 05:25 PM - Thread Starter
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I can't either yet! lol... I was thinking the same about your ported enclosure vs my sealed. I bet that has some crazy output. I'm finishing up a few other things then I should be able to get the other 2 boxes built and all 3 painted. Then I need to get some measurements done. Would be interested to see how yours measures as well when you find the time.
I'd love to see a REW measurement when you're done. I've yet to see any from a multiple HS-24 setup. Since mine is just for 2.1 music I won't be doing any EQ or treatments. But in a few days I'll get out the mic and post a graph.

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post #74 of 110 Old 07-28-2019, 07:22 PM
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If you only have one HS-24 and have the room for a 20 cu^ft cabinet, I would highly recommend you do it. As for the amp, both channels are running the driver. It's a dual 2 ohm configuration. I have the gain set at the third from last dot. So far no bad smells or excessive dust cap heat as long as the third light just flickers every once in a while. I've been pushing it hard today. Even though this is a strictly 2.1 system I did play some of my go to movie demo material. Irene is insane. She flexes like she's trying to get out of that cabinet.


I have 2 of the 24's but we bought a new house just as i was about to get a amp. So it is on hold for the foreseeable future. I will be building a dedicated room in a 15' x 17' bump out on my garage. So i should be able to find room behind the screen fo a box this size. It is just hard to decide how much amp i will need. I am strongly considering a xbs fp20000q. Just what to do with the two other channels i am not sure i can convince my neighbors that it is a good idea to have 4 of the monsters. Also i worry about breaking stuff at that level.
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post #75 of 110 Old 07-29-2019, 07:14 AM
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yeah man thanks for having us over..that 1 24 was insane...it was punishing that house and it wasnt even trying.

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post #76 of 110 Old 07-29-2019, 01:12 PM
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I'd love to see a REW measurement when you're done. I've yet to see any from a multiple HS-24 setup. Since mine is just for 2.1 music I won't be doing any EQ or treatments. But in a few days I'll get out the mic and post a graph.
Quite the setup for 2.1
Yea I'll definitely post up once I actually get them done... never enough time in the day lol

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post #77 of 110 Old 07-29-2019, 07:27 PM - Thread Starter
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This is the HS-24 and PA380 PPSL mid-bass module. Those 18s aren't in the room anymore. The measurement was taken at the sweet spot in the living room. The couch to the right of the center of the room. No EQ, no treatments, all hardwood floors. That 20Hz drop is the room. I've had a ridiculous number of 18s in here and every combination of subs rolls off at 20Hz.
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post #78 of 110 Old 07-29-2019, 07:43 PM
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This is the HS-24 and PA380 PPSL mid-bass module. Those 18s aren't in the room anymore. The measurement was taken at the sweet spot in the living room. The couch to the right of the center of the room. No EQ, no treatments, all hardwood floors. That 20Hz drop is the room. I've had a ridiculous number of 18s in here and every combination of subs rolls off at 20Hz.
How far away are you and how big is the room.

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post #79 of 110 Old 07-29-2019, 08:25 PM - Thread Starter
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How far away are you and how big is the room.
20'4" wide, 26'6" deep, 10' ceiling. Mic was 13' from the HS-24, the PPLS mid-bass module was near field.

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post #80 of 110 Old 07-29-2019, 08:29 PM - Thread Starter
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Needs more amp than a NX6000
You were right. I bought an NU12000 and am running a coil on each channel of the amp. Very good match.
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post #81 of 110 Old 07-29-2019, 08:48 PM
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Have you measured the 24 on it's own?

Building the room, speakers, and subs.
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post #82 of 110 Old 07-29-2019, 09:56 PM
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This is the HS-24 and PA380 PPSL mid-bass module. Those 18s aren't in the room anymore. The measurement was taken at the sweet spot in the living room. The couch to the right of the center of the room. No EQ, no treatments, all hardwood floors. That 20Hz drop is the room. I've had a ridiculous number of 18s in here and every combination of subs rolls off at 20Hz.
Nice. You have a decent little dip there like I do in my room as well. No EQ was done on this graph either. Really needs it though lol. Was testing the SVS PC-4000 and my sealed Ultimax 15. Dips hard around 38 hz. The room will do well with ULF though, as the SVS showed. That SVS in extended mode is only good to about 17 Hz, which is where it dropped. Really interesting in what my 24 will do. I need to just run some measurements in the next couple days. Off work now...
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post #83 of 110 Old 07-30-2019, 06:01 AM - Thread Starter
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Have you measured the 24 on it's own?
Yes, there's a big dip centered around 30Hz, then is like a mountain range after that. My plan is to move it into the theater this week for a REW measurement. That will give me a chance to compare it to six 18s. From what I understand, the HS-24 should best six UM18's.
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post #84 of 110 Old 07-30-2019, 06:34 AM
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You are just about centered in your room which will create all sort of frequency problems.

One 24 should be the equal of 3 UM18s in max output at 10hz. That of course with both built properly. We are always limited by the low end and can only play as loud as the weakest part unless we don’t mind distortion and compression. If we run a filter than you could run louder.

I am curious if you move your seats back if the low end will rise up. Not sure that is possible but much easier than moving the sub, I think.

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post #85 of 110 Old 07-30-2019, 12:08 PM
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Thumbs up

AWESOME pic!
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post #86 of 110 Old 08-01-2019, 05:42 PM
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Originally Posted by tarponater View Post
From what I understand, the HS-24 should best six UM18's.
I haven't ran the box model but I have my doubts on that claim.

6 18's is WAY more cone-area, and that's 6kW RMS of power handling.

Neither of which the 24 has...

If it doesn't beat it, then that would probably be a limitation of the boxes and room-nulls rather than the drivers.

A bit oversimplified but... using a PIr^2 formula the 24 has 452.39cu-inches of surface area.
An 18 has 254.47cu-inches. So not even 2 18's worth of extra surface area.
Now not all of the surround is used and some of that is basket, but the relativistic differences should be comparable. The rest of the displacement and SPL is just excursion and/or total power-handling.
3 18's is a reasonable approximation, 6... is stretching it a bit me thinks!
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post #87 of 110 Old 08-01-2019, 05:51 PM
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Originally Posted by tarponater View Post
That 20Hz drop is the room. I've had a ridiculous number of 18s in here and every combination of subs rolls off at 20Hz.
That is where your walls start acting like bass traps.

I am sort of kidding. But a unpowered speaker will vibrate in response to sound waves. I was told it was out of phase with the primary signal. That sort of makes sense to me... So, why not the walls ?
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post #88 of 110 Old 08-01-2019, 05:57 PM
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Tarp, what's going on with the unpainted MDF cabinet with dual ports in the picture too?
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post #89 of 110 Old 08-01-2019, 07:43 PM - Thread Starter
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Originally Posted by Craig S King View Post
Tarp, what's going on with the unpainted MDF cabinet with dual ports in the picture too?
LOL!!!! Yeah, it's an eye sore. LTD02 designed it for me a couple weeks ago. It's a PPSL with two PA380s in it. The thing actually sounds great. Chad gave me the drivers and I had piles of scrap MDF from all the builds ive been doing, so I figured, why not. Now I'm just looking for someone to give it to.
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JVC RS-540, Sony UBP-X800, Onkyo TX-RZ730 (7.2.4), Onkyo M-5010, Elite Screens 100" 16:9 (Spandex AT DIY)
DIYSG 1099 LCR, Polk TSX-150C (DIY) Atmos, Yamaha NS333 Surround & Surround Back
Triple HS-24 mkiii sealed, Dual SAN 214.5 Devastators, Dual Crowson actuators, NU12000, NX6000, XLS-2502, MINIDSP 2X4
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post #90 of 110 Old 08-01-2019, 08:05 PM - Thread Starter
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We moved the HS-24 into the theater today for some testing. This is the setup...
Four UM18 full marties, one in each corner of the room on two NU6000DSP
Four SP1804 nearfield in a 12 cu^ft cabinet tuned to 31Hz on one NU6000DSP channel A

One HS-24 MKIII in 19.64 ft^3 tuned to 17Hz on NU12000 front wall, just off center. See Pic

Having multiple 18s fixes the nulls and makes the MLP the best spot in the room. The single 24 puts a nasty null at the MLP. For movies, this is a terrible choice. However... The back wall is insane with the 24. It makes my eyes water, makes it difficult to breath with the right frequency, and will move the door about 8" with the right frequency. It will push and pull the door. If there was a way to fix the null at the MLP, I would absolutely take the 24 over the 18s. So for now, she stays in the living room.

The REW graph...
Green is the theater setup, 4 UM 18s 4 B52 18s. Full EQ applied.
Purple is the HS-24, no EQ.
Both measurements were taken at the MLP.

Please excuse the mess!

The HS-24 peaked at 124.5 dB while playing music tonight.
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JVC RS-540, Sony UBP-X800, Onkyo TX-RZ730 (7.2.4), Onkyo M-5010, Elite Screens 100" 16:9 (Spandex AT DIY)
DIYSG 1099 LCR, Polk TSX-150C (DIY) Atmos, Yamaha NS333 Surround & Surround Back
Triple HS-24 mkiii sealed, Dual SAN 214.5 Devastators, Dual Crowson actuators, NU12000, NX6000, XLS-2502, MINIDSP 2X4
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