Switch with volume control


I've come to the conclusion that what I want is a switch with a volume control that's transparent in its effect on sound. It could be balanced or unbalanced. The sources that would input to the switch are an Oppo 105, a Sony XA 5400ES, and a Parasound JC-3. All sources have the option of balanced or unbalanced output. The Oppo output is 5.1 or 7.1 analog, the Sony and Parasound stereo.

Any recommendations for such a switch? I've been using a Cary Cinema 11a with its inputs set to bypass essentially as a switch with volume control.

db
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It appears as though the Parasound P7 might come close. I've been warned that switching XLR can be tricky to avoid transients. I use balanced output to the amps because they sit between the speakers and thus are remote from the switch.

db
Placette makes a 3-input passive preamp that is basically just a volume control. Not sure how it would work with your Oppo though.

http://www.placetteaudio.com/passive_line.htm
Can any of those, except for the P7, handle multichannel inputs/outputs?
Kal,

In your opinion would replacing my Cary Cinema 11a with a Parasound P7 be a step up, a step down, or a sideways step, given that either can provide the functions I want? A Sony XA 5400ES connects via HDMI. but an Oppo 105 and a Parasound JC-3 connect via analog to the Cary. The Sony could connect via analog as well, if I limit it to stereo, a not unreasonable limitation with the Oppo in place. In either case, I'd use balanced output to the amps.

db