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Wiring three pairs of speakers

On the Yamaha there is REC OUT switch on front. You need to set it to whatever you want the Nikko to hear (the laptop plugged into Tape).
 
rwartner said:
On the Yamaha there is REC OUT switch on front. You need to set it to whatever you want the Nikko to hear (the laptop plugged into Tape).
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Yes, check your tape monitor switches.
The hum might possibly be a ground loop problem.
 
I did check the Tape monitor/Rec Out switches. That doesn’t seem the problem.

Is there anything concerning about using the Main In on the second receiver (instead of Tape or Aux)?

Any other ideas?

Hum: how do I check/solve ground loop issues? What components are most likely the cause?
 
I duplicated your setup and using the Tape as input on first does not go to second. Sorry about that. My input is a Maverick DAC. So everything is plugged into it and then into the AUX input of first amp. You have lots of inputs not enough places to plug them in.
 
My opinion - would look for different amp. Most likely integrated with more input capability. I rarely listen to radio. Y-adaptor might work never tried it.
I think you are trying to do too much with what you have.
 
You’re right, I try to get as much as possible out of what I have. That’s me.

Tried the Y adaptor. CD and laptop now share the Aux input. Works fine.

Different amp, sure, as soon as I hit the jackpot.
Has to have at least as good a phono stage, enough real beef to fill a large space, and sound as good as the R-2000. That won’t come cheap.
Plus, I’d then like to match it with slightly bigger speakers for the mains...
 
Now, about the hum.
What is the most likely trouble maker within all my components? And how to solve it?

Hope I can finally lean back after solving that.

Thanks!
 
is the hum constant no matter which input is being used?
do your receivers have polarized AC plugs, one blade wider than the other?
in not try turning the plug around.
you could also unplug all your components and plug them in one at a time to see if one of them is the culprit. Try both AC and the input jacks
one other thing. Is everything plugged into the same outlet via power strip?
Sometimes using different outlets can cause issues.
 
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Ok. Thanks!

Same outlet/power strip, yes.

But, unfortunately, there are other outlets on that same line (AC, lights, modem...) - the electricians installing them didn’t bother splitting and/or adding a new line. When the AC goes on at night for example, the lights on that line dim down for a sec.
Could it be that the AC (3 pole w/ground), lights or modem drawing power on another outlet on that same line are causing the hum?

Anyway, most likely a power source/polarization issue it seems. I’ll investigate my components and if not successful I’ll try unplugging other stuff on other outlets on that line.
 
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