2. amps-preamps
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How do I hook up 2 preamps to one amp

I have a NAD preamp that I use for music. I have a Lexicon preamp that I use for Video. The problem is I have 1 five chanel amp that I need to use for both preamps. When I try to use rca splitters/y adapters, my speakers play at a low volume. If I disconnect one preamp, the speakers play louder. What should I do to allow both preamps access to my 5 channel amp and not have humming or low volume.
kartez

Showing 2 responses by bdgregory

bdgregory
1,708 posts
 
what Elevick said is the answer - both of his posts. I'm not sure what Lexicon you're using but it's likely to be superior to your NAD - even for music, but if you prefer the NAD, then what you do is connect the the speaker outputs (ie Main L/R) from the Lex, to one of the inputs of your NAD. This can be Tape in, or any other unused input. When you watch video you pick set the volume level of the NAD to a level that is easy to remember and repeat - for example - 12:00 position. You calibrate your HT volume levels at this setting, and any time you watch HT, you return the NAD volume to this level. This way the volume control of your Lex will control your HT volumes - and pass through the NAD.

This all assumes your NAD doesn't have HT Passthru. This is the safest, lowest cost, and best sounding of all options for you.
bdgregory
1,708 posts
 
thanks Herman - yes, I re-read his after I posted mine and realized I misunderstood. I agree with you - it won't get to the power amp that way.

The way I described works very well - I used it with a Musical Fidelity Nuvista preamp and a Lexicon pre-pro. It's not as clean as if you have a true HT bypass in your pre - but with a quality preamp you will not notice any difference.
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