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In Reply to: They are all pretty good- and they all have problems posted by Ralph on June 11, 2012 at 09:35:17:
The impedance issues you mention are not "problems" as you would like to convey. They are simply parameters or rules to consider for implementation.One thing I have found as I have ditched mega-buck active preamps is that with an AVC, if you take heed of these parameters and system gain, nothing will surpass the passive as long as you like the sound of your amp. I suspect the latter is the biggest problem of all.
Btw, it seems to me that most dacs' output are 2-2.5 and in balanced configuration double this. The more you attentuate the AVC, the more the "problems" go away.
Edits: 06/13/12
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Follow Ups
- Disagree...maybe it's just semantics but - Plinko 06:02:04 06/13/12 (6)