The BlackReign: 2x21" sealed sub - AVS Forum
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post #1 of 76 Old 09-28-2011, 12:51 AM - Thread Starter
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This is my latest build.

A powered sealed sub basend on 2x21" Beyma woofer.
The plate amp is a powerful plate basend on Powersoft module (6500w total power on 8ohm)


This thing play loud and tight
LL
LL
LL
LL
LL
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post #2 of 76 Old 09-28-2011, 12:55 AM
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pure wickedness
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post #3 of 76 Old 09-28-2011, 01:19 AM
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you can't just launch in with that. more details on the build, process, application, etc. are required.

otherwise, you will just get a whole bunch of "wows".

by the way...wow! ;-)

Listen. It's All Good.
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post #4 of 76 Old 09-28-2011, 02:48 AM - Thread Starter
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I preferred Beyma 21" to most famous B&C because in my opinion works well in a sealed design. (a bit high qts value, same BL factor and less MMS)
The FR in anecoic chamber is quite better than 21" B&C speakers.

The cabinet is build with 38mm and 19mm MDF with heavy intenal bracing.

With a Linkwitz Transform the FR remain flat to a few HZ in a 30mq dedicated room.

The self made plate amp is the true heart of this sub, 3400w on 8ohm in bridge mode per amp module (one module amp paired wih one woofer).

I have in my config. two of this sub and one TCSounds LMS5400 loaded in 100Lt box, all managed with a 8x8 miniDSP kit.

http://www.minidsp.com/forum/6-diy-h...t-in-rack-case
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post #5 of 76 Old 09-28-2011, 03:01 AM
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Quote:
Originally Posted by scomed99 View Post

I preferred Beyma 21" to most famous B&C because in my opinion works well in a sealed design. (a bit high qts value, same BL factor and less MMS)
The FR in anecoic chamber is quite better than 21" B&C speakers.

The cabinet is build with 38mm and 19mm MDF with heavy intenal bracing.

With a Linkwitz Transform the FR remain flat to a few HZ in a 30mq dedicated room.

The self made plate amp is the true heart of this sub, 3400w on 8ohm in bridge mode per amp module (one module amp paired wih one woofer).

I have in my config. two of this sub and one TCSounds LMS5400 loaded in 100Lt box, all managed with a 8x8 miniDSP kit.

http://www.minidsp.com/forum/6-diy-h...t-in-rack-case

you are THE man!
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post #6 of 76 Old 09-28-2011, 04:43 AM
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Damn! That is some fine stuff!

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post #7 of 76 Old 09-28-2011, 05:36 AM
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How do you have the LMS and the 2 Beyma's setup? Like what frequency do they crossover at between each other?

Nice finish on the cabs
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post #8 of 76 Old 09-28-2011, 06:01 AM
 
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Submersive XXL, nice!

This is the 21SW1600Nd?

And 6500w "self made plate amp"? That should be a thread in itself!
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post #9 of 76 Old 09-28-2011, 06:01 AM - Thread Starter
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All 3 sub have the LP filter set to 80hz, but the LMS5400 is set to work lower 30hz.
Here the global FR:
LL
LL
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post #10 of 76 Old 09-28-2011, 06:09 AM - Thread Starter
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Quote:
Originally Posted by BiGBADDABOOM View Post

This is the 21SW1600Nd?

Yes, in my opinion this is one of the best sounding woofer ever made, 1600w rms, 3200 peak with 60mm xmec, 98db 2,83v.
In a word: devastating!
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post #11 of 76 Old 09-28-2011, 07:30 AM
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how does the surround produce 60mm xmech? it doesnt look much bigger than my little emminence 10" surrounds

(European models do not accept banana plugs.)

 

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post #12 of 76 Old 09-28-2011, 07:39 AM
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Quote:
Originally Posted by beastaudio View Post

how does the surround produce 60mm xmech? it doesnt look much bigger than my little emminence 10" surrounds

It doesn't. 10mm Xmax. The LMS 5400-18 will kick the snot out of it from A to Z. The LMS requires more power, so... pfft... get more power.

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post #13 of 76 Old 09-28-2011, 08:02 AM
 
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Looks like 15mm xmax. The 60mm rating is "peak to peak" (double xmax), a "X Damage" rating.

An 18" LMS 5400 has 75% more displacement than the 21" Beyma.

Dollar per liter displacement:

Beyma 21": $146 / L

LMS 18": $102 / L
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post #14 of 76 Old 09-28-2011, 08:07 AM
 
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post #15 of 76 Old 09-28-2011, 08:25 AM
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Wow! Flat to below 10 Hz. Very impressive!

Dumb enough to spend lots of cash on this junk!
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post #16 of 76 Old 09-28-2011, 09:08 AM
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I'm sure a few people in the DIY community would be curious to hear where you got the amp modules from....
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post #17 of 76 Old 09-28-2011, 09:13 AM
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Wow! Epic!

My Dual 18" LLT subs 120dB down to 10hz

 

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post #18 of 76 Old 09-28-2011, 09:17 AM
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Quote:
Originally Posted by beastaudio View Post

how does the surround produce 60mm xmech? it doesnt look much bigger than my little emminence 10" surrounds

Proportion. It does not look like it but that is 21" subwoofer. It is a lot bigger than what it looks like.

........ i thought i taw a puddy tat .....
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post #19 of 76 Old 09-28-2011, 09:42 AM
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Cool build and nice execution.
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post #20 of 76 Old 09-28-2011, 09:54 AM - Thread Starter
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Quote:
Originally Posted by beastaudio View Post

how does the surround produce 60mm xmech? it doesnt look much bigger than my little emminence 10" surrounds

The surrond is 40mm!!!
I don't know your 10" eminence, but I think that haven't surrond like this....
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post #21 of 76 Old 09-28-2011, 10:18 AM - Thread Starter
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Quote:
Originally Posted by bossobass View Post

It doesn't. 10mm Xmax. The LMS 5400-18 will kick the snot out of it from A to Z. The LMS requires more power, so... pfft... get more power.

Bosso

It does very well, 15mm xmax with linear escursion and 60mm xmech p-p.
This is normal with pro woofer.
Of course the LMS5400 is a great woofer that have a big linear excursion (38mm) and 90mm xmech p-p, there's no doubt!
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post #22 of 76 Old 09-28-2011, 11:12 AM - Thread Starter
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Quote:
Originally Posted by findbuddha View Post

I'm sure a few people in the DIY community would be curious to hear where you got the amp modules from....

Powersoft is one of the finest italian electronic company and I'm italian too

I think threre's also a U.S. dealer.

Excellent amp, but not inexpensive.....
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post #23 of 76 Old 09-28-2011, 11:17 AM
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That amp module looks very similar to the PWR-DSP1 Im about to test this weekend!!

Mine is the MiniDSP PWR-DSP1 with Pascal Modules and peak power of only 4000Watts @ 4 ohms.

Very nice build!!

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post #24 of 76 Old 09-28-2011, 11:20 AM
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Quote:
Originally Posted by flyng_fool View Post

Wow! Flat to below 10 Hz. Very impressive!

FWIW, we can EQ any design flat to 10Hz...remember the ULS-15 Flat to 10Hz BS

What is important is actually knowing Max clean Output and not EQed flat responses at 75dB to 90dB levels.

Again, nothing against the build, the OP has his requirements and its an awesome solution but we just need to understand the numbers better before we post "very impressive".

Back to the important POV...Nice MinidSP build too!! Damn good work overall.

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post #25 of 76 Old 09-28-2011, 11:26 AM
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Quote:
Originally Posted by penngray View Post

Back to the important POV...Nice MinidSP build too!! Damn good work overall.

Yeah! I'm really interesting in hearing more about his custom 8x8 MiniDSP. I WANT!

My Dual 18" LLT subs 120dB down to 10hz

 

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post #26 of 76 Old 09-28-2011, 11:36 AM
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I would like to know if there has been inaccuracies with EQing below 20Hz like Notnyt found with his 4x8 MiniDSP.

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post #27 of 76 Old 09-28-2011, 11:48 AM - Thread Starter
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Quote:
Originally Posted by penngray View Post

That amp module looks very similar to the PWR-DSP1 Im about to test this weekend!!

Mine is the MiniDSP PWR-DSP1 with Pascal Modules and peak power of only 4000Watts @ 4 ohms.

Very nice build!!

I know Pascal module and is a good module,
Powersoft module is a bit different and a bit more powerful, the DIGImod3000 series directly derive from K series, you know?

http://www.powersoft-audio.com/en/pr.../k-series.html
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post #28 of 76 Old 09-28-2011, 11:49 AM
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It's the same platform. they released software to address the problem, but I'm trying to get them to add the same filter setup for shelf filters instead of just the peak filter

They don't like to respond to me too much
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post #29 of 76 Old 09-28-2011, 11:54 AM - Thread Starter
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Quote:
Originally Posted by penngray View Post

I would like to know if there has been inaccuracies with EQing below 20Hz like Notnyt found with his 4x8 MiniDSP.

At this time I don't need eq below 20hz (I don't use "eq sub peak"), in my opinion 8x8 miniDSP kit is a good EQ, not perfect, but a good eq.

what inaccuracies found Notnyt?
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post #30 of 76 Old 09-28-2011, 01:01 PM
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Quote:
Originally Posted by scomed99 View Post

It does very well, 15mm xmax with linear escursion and 60mm xmech p-p.
This is normal with pro woofer.
Of course the LMS5400 is a great woofer that have a big linear excursion (38mm) and 90mm xmech p-p, there's no doubt!

First, great build. MORE PICS.

Now, how do they get the 15 mm spec? It's an overhung, 35 mm long coil, 14 mm tall gap. How do we get 15 mm overhang from those specs?

Just curious...

Bosso
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