2. amps-preamps
  3. 1279667960

HK Citation 7.1 & 5.1 "pop" when turning on or off

I just upgraded my receiver (which I use the preouts) to the new Onkyo TX-NR5007. I know, a lot of you guys feel it's a sacrilege to use a receiver as a pre-amp...but it's a good value and has a lot of inputs I feel.

So, I have the pre-outs feeding a bridged Citation 5.1 for my two center channels (Infinity Kappas), another feeding a Citation 7.1 which I use to to biamp the L/R Kappa towers and another Citation 7.1 feeding the SR/SB channels.

Recently the wife has noticed a high pitched pop when starting up, turning off, and sometimes when switching sources or THX/DTS modes.

I'm wondering if it's the old solid state amps charging up down and that's the joy of older tech. If I've got a ground loop problem. Or if there's some solution.
agdthree

Showing 2 responses by agdthree

agdthree OP
3 posts
 
It does happen on all 8 speakers (not the sub).

I tried using a few different ground loop hum eliminators from the preamp/receiver to each amp, but that added more constant noise in the background.

I'll try some deoxit. I'm using bluejeans cable interconnects, but will try another brand and/or roll my own.

I do have all three amps rackmounted, at the base of my rack, with a couple inches on the top/bottom. Any chance they are interfering with each other?

I also have tried hooking them up direct to a dedicated outlet and to a Panamax conditioner.

Could another component in the chain be adding noise? I had a groundloop issue with my PS3...HDMI can pass on noise...but I fixed that....could an old analog tape deck or some other component cause the popping?

I used Axiom's Coax in line ground loop fixes for my Tivo 3 and cable modem...which is how I got the PS3 to behave.

Look forward to your thoughts. Thanks again.
agdthree OP
3 posts
 
Ok, tried de-oxit, swapped cables, and unplugged everything from the receiver. Still popping at shut down, turn on, and when I switch some sources and/or decoding mode (e.g. THX games vs PLII vs DD).

Is it possible that the pops are simply coming from the receiver (which I'm using pre-outs on)?

When I hook up a Sunfire out, the pops are way less pronounced, still there, but I attribute that to the newer "soft start" of the Sunfire and the potentially less SPL...as, the Citations I have tried them bridged, biamped, un-bridged...singled...same issue.
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