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From: dca@edison.UUCP (David C. Albrecht)
Newsgroups: net.audio
Subject: Re: Re: Cassette deck advice
Message-ID: <561@edison.UUCP>
Date: Mon, 30-Sep-85 09:45:42 EDT
Article-I.D.: edison.561
Posted: Mon Sep 30 09:45:42 1985
Date-Received: Sat, 5-Oct-85 07:27:59 EDT
References: <275@pedsgd.UUCP> <2363@sdcrdcf.UUCP>
Organization: General Electric Company, Charlottesville, VA
Lines: 27

> In article <275@pedsgd.UUCP> bob@pedsgd.UUCP (Robert A. Weiler) writes:
> > ...
> > One strange note - the salesfolk at Woodbridge Stereo are saying
> > that HX-Pro is a subtefuge used by 'lesser' decks to compensate
> > for the inferiority of their heads as opposed to the NAK. ...
> 
> I think the salesfolk at Woodbridge are a bit biased towards the NAK.
> Many quality manufacturers use HX-Pro, generally in their high-end units.
> (based on the manufacturer's specs in the Oct '85 issue of Audio magazine).
> 
> Having just gone through the job of finding a new tape deck, I checked
> just what HX-Pro does (or is supposed to do).  In short, it changes bias
> levels depending on the high frequency content of the program material.
> This is supposed to overcome at least some of the deficiences of the tape.
> 

The point to be made here, I think is that some of the decks (not all but
some) which incorporate Dolby HX have pretty mediocre response without
the HX and very good response with it.  This says to me that HX can act
as a 'subterfuge' if you want to call it that.  Imagine how good a NAK
deck would be with HX on it.

I have also heard and this is imperfectly remembered speculation that
NAK uses a higher bias frequency which gives some of the same results
as HX.

David Albrecht