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For monitoring I need to drive sound of multiple soundcards into one and single amp with 4 inputs and 4 outputs

No routing, input 1 goes to output 1, and so on.

My speakers (4): 15-100w 8ohm FR 90Hz-20kHz (+-3dB) 87dB

Could you recommend me a simple solution ?

Something like the unit below would be great. But it's a unit for headphones and I think it won't provide the 100w I would like to send to the speakers.

alt text

http://www.berhinger.com/EN/Products/HA4400.aspx

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should be tagged soft-question –  Sklivvz Dec 19 '10 at 23:48
3  
@Skliwz - What's that? –  neilfein Dec 20 '10 at 6:00
    
Unfortunately all of the inexpensive rack-mount, powered mixers on the market appear to be stereo (two 100 watt channels), so you would need two units to get four channels. –  Robert Harvey Dec 20 '10 at 6:36
    
@Robert: Thanks. I've been told a simple car audio amp could do it. Regardless the impedance. So I'll try that, and if it doesn't work, I'll buy that Brad suggests below. –  Pierre 303 Dec 20 '10 at 16:21
    
@neilfein: a way of tagging questions with no objective answer –  Sklivvz Dec 21 '10 at 8:03
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2 Answers 2

up vote 2 down vote accepted

The ART SLA4 should meet your needs. Not the cheapest amp around, but it fits in one rack unit and is of high quality.

ART SLA4 ART SLA4 Rear

If that is too expensive for you, just plug in whatever amps you like that aren't. You don't need to run all four channels in one amp.

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That's perfect! thank you –  Pierre 303 Dec 20 '10 at 16:19
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I use the Behringer Eurorack RX1602. It's simple and cheap (100£) and does the job.

http://www.berhinger.com/EN/Products/RX1602.aspx alt text

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Nice machine, but it has only 1 output (stereo). I need at least 4. And 4 inputs. –  Pierre 303 Dec 19 '10 at 23:56
    
I don't understand, if you have four channels at line level, what's preventing you from plugging them in directly in the amp? How many line ins do you need to mix? –  Sklivvz Dec 20 '10 at 0:14
    
As stated in the original question: no routing. (So no mixing.) –  Pelle ten Cate Dec 21 '10 at 9:39
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