Hey Bob,

Good points that I also agree with...Power Conditioners solve many issues, and I always have them in my rack equipment. You never know what kind of power you are plugging into away from your studio or home.

Additionally, there is another product I have used for audio signals called the "Hum Eliminator" by EBTECH, made in the USA. These have worked well for me in many situations, especially when taking line outputs from various amplifiers or devices. The units use smart jacks that auto convert between balanced and unbalanced lines, have no power requirements and come in two channel (two-in, two-out)TRS, 2 channel TRS/XLR, and single space 8 channel rack mount TRS and XLR units. Most of the music stores carry these products.