Path: utzoo!attcan!uunet!cs.utexas.edu!uwm.edu!dcatla!dnwle
From: dnwle@dcatla.UUCP (W. Lawrence English)
Newsgroups: rec.audio.high-end
Subject: Re: Passive Preamp
Message-ID: <3004@uwm.edu>
Date: 21 Mar 90 17:57:07 GMT
References: <9003170016.AA25031@psyche.mit.edu>
Sender: news@uwm.edu
Reply-To: dnwle@sune.UUCP (W. Lawrence English)
Organization: DCA Inc., Alpharetta, GA
Lines: 18
Approved: tjk@csd4.csd.uwm.edu

In article <9003170016.AA25031@psyche.mit.edu> jacob@psyche.mit.edu 
 (Jacob Feldman) writes:
>both the PS Audio bypass and an Adcom passive "preamp" I once heard have
>a flat, lifeless quality as well as a very peculiar, unnatural-sounding

note: i have a ps audio 4.5, with this "straight line" mode. i have noticed
that my cassette deck, in particular, seems to exhibit this. 

my guess is that specific devices, such as a given tape deck or tuner, are
not designed to drive a power amplifier directly. power amps can have quite
low input impedances ( as low as 10K ohm ), as opposed to the input 
impedance of a good preamplifier ( at least 100K ).


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