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In Reply to: I know the answer. posted by Wordsmith on August 31, 2002 at 22:37:47:
About crosstalk between input channels - wouldn't that be case of a preamp design problem?What's surprising is that this amp got great press. Why is it that a supposed major design flaw has not been exposed or even much discussed?
Is there something I'm not getting?
Follow Ups:
From reading your posts, it looks like there is only one RCA from the pre going into one channel.Shouldn't you check for crosstalk with the unused input shorted ?
Maybe one of the helpful engineers here can assist with a simple test for crosstalk which will reassure you that your amp is within its spec.
Shorting plugs on unused inputs is a good idea anyway- check the Tweakers Asylum archives for more info.
good luck
john dem, fresh from some very cross talk at the Vinyl Asylum
Does it matter since the A3Cr is supposed to be a "dual mono" design?
a single chassis but both channels have completely independent circuitry and independent power supplies.The proximity of the leads/tracks from L and R however can be very tight on a particular input, or throughout an amp- I'm sure one of the designers here could give some more detail on how proper design and layout can minimize problems, but with one unconnected input on your power amp picking up and amplifying signals from the nearby active channel(s)- you may expect some crosstalk to be audible.
I have a test cd somewhere from Denon with test tones on each channel for crosstalk measurements- maybe you can hunt up a similar CD and check the crosstalk with some degree of certainty.
even with the unused input open or unshorted on one channel as described in this thread.
G.
Crank it up...
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