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Old 10th March 2010, 10:36 AM   #1
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Default linkwitz-riley 3way and 2way pcb kit??

I am look for some nice 3way LR24 active crossover pcb's and also for 2-way
I have seen esp-site but what more is there?
I want dedicated 3way pcb and also dedicated 2-way pcb.
Please some suggestions

It is for an active system with three 3-way and two 2way active speakers (sacd 5.1)
two 3way with two SS 21w8555/12mRev/990000Rev (L+R front)
one 3way with 22wRev/12mRev/9900000Rev (mid)
two 2way with 15wRev/Vifa ringradiator(metalfront) or peerless HDS (L+R rear)
one low/sub with two SS 25W's
Amps; all Aleph 60 and 30 clone's (4xA60mono's and 10 A30mono's)
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Last edited by aaronboumans; 10th March 2010 at 10:45 AM.
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Old 10th March 2010, 11:18 AM   #2
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Check out Linkwitz Lab - Loudspeaker Design where the man himself sells his ASP boards. Pricey, but you get a lot more with them than just a three way XO. Phase correction, shelving, notch filters, all useful stuff if you are going for top sound quality. The site gives information to allow you to design your own crossover using his building blocks.
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Old 10th March 2010, 12:46 PM   #3
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thanks but its not what I want.
Just want simple (but good quality) 24dB-LR 2and3way pcb's
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Old 10th March 2010, 06:35 PM   #4
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How will you handle baffle step correction? How will you tame the breakup peaks? Phase alignment? just a straight textbook crossover is fine if your drivers are flat an ocatve or two into their stopbands. Are those?

Drivers of that quality deserve a good implimentation. I suggest that you read over Linkwitz' design pages to get a feel for the finer points of crossover design. Phase alignment makes a big difference - even my then 14 year old noticed when I incorporated it. Linkwitz put all that stuff on his boards for good reasons.

You'll be happier with the added featurs of Linkwitz' boards if implimented properly than a straight LR4. If that's all you want, though, Rod's boards are fine.
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Old 10th March 2010, 07:05 PM   #5
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Default Marchand Electronics

The Marchand Electronics XM-1 is a 2-way LR4 board. Its plug and play. See:
XM1 Electronic Crossover Network

-Charlie
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Old 17th March 2010, 05:00 AM   #6
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Quote:
Originally Posted by aaronboumans View Post
thanks but its not what I want.
Just want simple (but good quality) 24dB-LR 2and3way pcb's
http://www.siliconchip.com.au/cms/A_30278/article.html

Sub the TLO74's for OPA4134's and your home and hosed.
Cheers George
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Last edited by georgehifi; 17th March 2010 at 05:04 AM.
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Old 17th March 2010, 05:46 AM   #7
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have a look at the MiniDSP crossover boards. They have a few threads on this forum and their own website.

col.
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Old 5th April 2010, 08:55 AM   #8
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Aaron,

I have 4 Marchand XM-9 boards. Perhaps you are interested?

Jan
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Old 6th April 2010, 02:08 AM   #9
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Quote:
Originally Posted by aaronboumans View Post
I am look for some nice 3way LR24 active crossover pcb's and also for 2-way
I have seen esp-site but what more is there?
I want dedicated 3way pcb and also dedicated 2-way pcb.
Please some suggestions
There is a "universal" crossover board at this address (see circuit #2): Neil’s DIY Plate Amp Page There are ExpressPCB schematic and PCB files that you can modify to your liking. I've used this board several times--it works fine.

If you want something more programmable, you can adapt the design from circuit #1, which uses resistor packs to set the crossover frequency.

If you want "soft" programmablity, the circuit on the left side of the board below is pretty cool. It's LR24 using digital potentiometers instead of resistors. I've got the USB interface fully working--just set it up once and whenever the on-board micro is powered up it programs all of the potentiometers. There is a full description of the feature set in this thread:
Any interest in small active crossover board? - Techtalk at Parts-Express.com If you want the ExpressPCB files posted, I'll be happy to do so.

active_xover_brd.jpg
analog_crossover.jpg
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Old 6th April 2010, 02:45 AM   #10
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I've designed this board some time ago but I guess it will help you.

Crossover Linkwitz-Riley para sistemas 2.1 - Foros de Electrónica

The post is in spanish (I'm from Argentina) but you can translate it quite easily by using any translator web site.

Hope it helps...
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