Explain 'channel seperation'

[kenratboy]

I always hear this term used, but have no idea what it means. People say bigger, more expensive amps give them better channel seperation than, for example, a little receiver.

What is channel seperation? Is this crosstalk between channels? Is this channels loosing dynamic range when other channels in the same box (amp) are being driven hard?

Thanks!

[Griffinator]

Your first submission was correct.

Channel separation is all about the minimization of crosstalk between channels.

[boom3]

Stereo power amps usually have a great deal of seperation, above 60 dB in most cases. The limiting factor for seperation in an all-analog chain is usually the phono cart, which will usually have no better than 18 dB seperation at the extreme ends of the audible spectrum. In the middle 25-35 dB is the norm. FM tuners will usually do about that well or somewhat better, but the seperation of all but the best designs poops out as the 30 Hz and 15KHz cut-offs are approached. After all is said & done, if your entire chain has at least 24 dB seperation across most of the audible band you're doing fine.