Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10 5/3/83; site houxm.UUCP
Path: utzoo!linus!decvax!harpo!eagle!mhuxl!houxm!5121cdd
From: 5121cdd@houxm.UUCP (C.DORY)
Newsgroups: net.audio
Subject: Re: dbx info sought... - (nf)
Message-ID: <669@houxm.UUCP>
Date: Thu, 5-Jan-84 12:47:17 EST
Article-I.D.: houxm.669
Posted: Thu Jan  5 12:47:17 1984
Date-Received: Fri, 6-Jan-84 02:45:50 EST
References: <4743@uiucdcs.UUCP>
Organization: Bell Labs, Holmdel NJ
Lines: 29

There are two types of dbx noise reduction: Type I (professional) and
Type II (consumer).  Type I dbx is best used with pro-quality recording
gear as its circuitry is sensitive to magnitude response non-linearities
throughout the audible spectrum.  Type II dbx (as stated before) is not
sensitive to these problems above 10K Hz. -- thereby making it useful
for cassette decks and the like.

The two dbx units that I have direct experience with (I own one of each),
are the dbx 150 (Type I) and dbx 224 (Type II).  Both units are two-channel
encode/decode systems -- this means that if you have a three-head tape
deck, you can monitor off the tape and utilize the noise reduction.
Both units come in 1U (1 3/4 in.) high rack mountable box and are quite
attractive as audio components go.  The dbx 224 also has the capability
to decode dbx encoded discs (additional rumble suppression is added
to the noise reduction circuitry to reduce dbx mistracking).

The dbx 224 is available from most of the mail-order discount houses,
Stereo Corp. of America (ph. 800-221-0974) in particular had, at last
check, a price of $172.  The dbx 150 is only available from pro-audio
establishments (i.e., Valley Audio - Nashville, or Martin Audio - NYC) --
its price is around $300 - $350.  Service availability is not really
an issue here -- there is nothing really to go wrong with either unit
(no moving parts, etc.).  I've had no problems with either of my units
(I've carried my 150 around to location recording sessions for nearly
three years).
  

                                       Craig Dory -- AT&T Bell Laboratories
                                                          Holmdel, NJ