The pop is no big deal per se but keep dial volume at a max of 7. You are hearing pop most likely because sub volume set too high. But on manual switch power up that's normal. When you do audyssey, try sub at the 5 setting. If you have an SPL then set it to 70 using pink noise from the receiver as a start.
Sorry to hear about the feet. Ground loop is a very specific sound. Is it coming from sub's woofer or the amp section? If its from the amp section it may be DC Offset and not ground loop.
I have DC Offset issues at my house due to dimmers and hear it on my power amp but not the revel but that doesn't mean you won't in your case.
Sorry to hear about the feet. Ground loop is a very specific sound. Is it coming from sub's woofer or the amp section? If its from the amp section it may be DC Offset and not ground loop.
I have DC Offset issues at my house due to dimmers and hear it on my power amp but not the revel but that doesn't mean you won't in your case.