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Discussion Starter · #1 ·
I have a poping coming from my speakers when I change inputs.


I have a Pioneer 45 TX mated with an Adcom 545 power amp. This started when I added on the amp.


So I did some testing............if you cycle quickly between inputs the noise goes away after about 3 cycles. Say between DVD and CD. All of them act the same.


2. I bought a Rat Shack ground loop isolater for the cable connection. I got a loud hum after hooking that thing up but the POP went away.


3. I plugged the ADCOM in to its own dedicated circuit. No help there.


4. I checked all connections.


5. I bought some really good cables for the preouts out of the 45TX. Some help.


I thought it may be the preout out of the 45 because when your playing a DVD and the sound starts you get a pop.


You never get a pop once the source is playing.


If you turn the 45 to ___ (no volume) and go to -80 you'll hear a small pop even if the amp is off.


Its weird Everything is hooked up to a Monster Power 2000.


Any suggestions?


Mike
 

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Do you still get the pop when the cable connection is completely disconnected?


Try disconnecting all sources and try switching, do you get the pop?


Reconnect one source at a time to see if one particular source is the cause.
 

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Discussion Starter · #4 ·
Ok:


I tired disconnecting everything audio one at a time and nothing worked.


Except disconnecting the Adcom amp.


Could the signal from the Pioneer pre-outs be different than the Adcom inputs accept?


Mike
 

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It sounds like the fault is in your 45TX. The line levels should be fine between the two components. You could check it with another amplifier if you have one (even an old receiver could work) just hook it up to an available input, or you can try an in-line attenuator like these.
 
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