[Intamin]

Originally Posted by Big Daddy

Popping sound is usually an electrical problem that could be due to grounding problems, not enough power, loose or interfering cables, power surges, other appliances, etc. Do all the following:

• Make sure all cables are in place properly and keep the speaker cables separate from the power cables.
  Did it, and if this were the issue I would have a pop with both amps since I remove one from the rack and put the other one in its spot
• Double check to make sure none of the cables are cut and exposed shielding. This can cause a short or it can pick up noise. Did it. If this were the issue, then I would have a pop with both amps
• Use shielded cables. Interconnect cables with two layers of copper braid shielding are the best. Most are, I think one set isn't. Either way, if this were the case, a pop would result with both amps since the interconnects remain the same
• Use XLR cables, if possible. I use balanced from my m5 to p3, and I've also tried non balanced. Both result in a pop.
• Plug the components in different outlets. I've tried every combination as stated above. I've done some to my power conditioner and others to dedicated 20 amp circuit. I've tried all on on PC. I've tried all on 20 amp circuit, and I've tried a combo. Still get the pop
• Use good power conditioners/surge protectors on all components, including the cables from cable/satellite TV. Have them. If this were an issue, both amps would have the pop
• Use ferrite core noise blockers. Check Parts Express. I suppose I could look at this, but I don't think it's the issue.
• Other than that, check other electrical appliances to see if they are going on and off while you are listening to your system and causing power problems. If it were appliances, I would have the issue with both amps. However, as soon as I put in the Multi 2 amp, within a few minutes I get my first pop. I kept my Rotel on for 24hrs plus and never had a pop. I don't think that's a coincidence since I regularly get a pop with the multi 2.

For additional information, read Ground Hum & Ground Loop Isolators.

My responses are in blue.