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Post by tarascon on Aug 17, 2018 17:33:48 GMT -5
I am looking for a new seven channel power amp and have a question. Currently I have a 5 channel speaker system and plan on getting the new amp before getting the 6th and 7th speakers installed (in the wall). My question is: If I hook an Emotive 7 channel amp up but with only 5 inputs and speakers for a while, should I put some shorting plugs (either 0 ohms or some resistance value) into the inputs to keep the additional unused channels from generating hum, using unnecessary power, or putting the unused channels into some unstable condition?
Regards,
John
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Post by Casey Leedom on Aug 17, 2018 17:44:21 GMT -5
Nope. First, no need. Second, I'd be scared of shorting anything in a system ...
Casey
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hemster
Global Moderator 
Particle Manufacturer
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Posts: 51,920
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Post by hemster on Aug 17, 2018 17:47:58 GMT -5
No, don't do that. Nothing is required if you're using only 5 channels on a 7 channel amp.
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Post by pknaz on Aug 17, 2018 18:03:31 GMT -5
What Hemster said - I do it all the time (run fewer channels than the amp has)
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Post by tarascon on Aug 17, 2018 18:23:54 GMT -5
OK, thanks guys. My background is digital design with some analog but NO audio power amp design experience. Didn't want to put the amp in to some unknown state with floating inputs.
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Post by Loop 7 on Aug 17, 2018 20:56:02 GMT -5
I've been using only 3 channels on a Parasound 5 channel amp for years and, for a while, I used only 2 of the 5 channels.
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Post by leonski on Aug 17, 2018 21:18:37 GMT -5
Just to Complete the answer:
If you had asked about a TUBE amp, the answer would be completely different.
Tube amps MUST have a load on the OUTPUTS. I don't think there are any exceptions.
A simple power resistor would work. Make it near what a speaker would be.....maybe 8 to 16 ohms.
As for inputs? Many recommendations for shorting plugs using a 470ohm resistor. (a standard value, as you know)
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