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miniDSP Low cost, modular Digital Signal Processor (DSP) kits for the DIYer from miniDSP.

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Old 25th January 2012, 11:43 PM   #21
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Join Date: Aug 2010
Location: Sulawesi
That's complicated options... If you want to keep it simple, cheap and efficient, you can use 3 stereo linear pots (the longest models are better) that move together with a piece of wood. This is more than elementary I guess.
On this pic, the pots are on the amps face plate because these amps are in a common rack. It's a bad option because it uses more cable length. If I had to do it again, I would put them directly on the top of the DCX, between the output stage and the XLR with a little surgery of the top plate.

Trims can be needed if the amps have different sensitivities. Keep in mind that for the best of the bits integrity , the digital levels of the outputs have to be at 0 dB if possible.

This said, I run a tweaked DCX, I'm satisfied with it. But if I had to start again, I probably would go to the 2x8 mini DSP with the digital input module. It's more in the DIY spirit with a still better flexibility.
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Old 26th January 2012, 01:52 PM   #22
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Join Date: Mar 2011
Location: Rochester, MN
Cool! Have you checked to see how closely each pair stays with the others as far as level matching? Interesting idea......

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Old 26th January 2012, 02:42 PM   #23
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Join Date: Aug 2010
Location: Sulawesi
I've been testing with the multimeter, it's acceptable. One thing to check before buying is that they must have a protection against dust. But the mechanical part has to be well done, the piece of wood must stay horizontal.
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