In Reply to: RE: The KX-R does not work like this-Accuphase posted by fmak on November 17, 2014 at 21:56:26:
Lucy decided to provide us the following comments:Passive preamps are sub-optimal.
Plain pots really don't like to have their wipers loaded. It causes distortion. The capacitance of a cable accounts, too. It requires current to charge when a signal is applied. Wipers distort when they are asked to provide current.
Those Vishay foil resistors actually have measurable flaws. Forget about the Placette.
http://www.ap.com/download/file/747
Transformer based units have the usual transformer limitations.
Plus... A good preamp also provides some manner of common mode rejection.
Certainly all the Ayre units do. Think that matters?Finally... An AX-5 is basically an econo version of my KX-R preamp, but with larger resistors in the volume control to give it voltage gain. Obviously, the output buffer of the KX-R is WAY heftier, as is the power supply.
Edits: 11/18/14 11/18/14
This post is made possible by the generous support of people like you and our sponsors:
Follow Ups
- RE: The KX-R does not work like this-Accuphase - Mercman 05:44:15 11/18/14 (4)
- You should - fmak 08:14:11 11/18/14 (3)
- RE: You should - Mercman 08:16:58 11/18/14 (2)
- RE: You should-Don't they say - fmak 22:58:34 11/18/14 (0)
- RE: You should - Sprezza Tura 08:26:37 11/18/14 (0)