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From: john@gcc-bill.ARPA (John Allred)
Newsgroups: net.audio
Subject: Re: Pad line level to phono level
Message-ID: <352@gcc-bill.ARPA>
Date: Tue, 8-Oct-85 08:44:44 EDT
Article-I.D.: gcc-bill.352
Posted: Tue Oct  8 08:44:44 1985
Date-Received: Fri, 11-Oct-85 07:07:19 EDT
References: <281@kepler.UUCP>
Reply-To: john@gcc-bill.UUCP (John Allred)
Organization: General Computer Company, Cambridge Ma (Home of the HyperDrive)
Lines: 30

In article <281@kepler.UUCP> mojo@kepler.UUCP (Morris Jones) writes:
>I'd like to be able to play my CD through my friend's Onkyo receiver/amp.
>Problem is the receiver has no other inputs besides the phono preamp
>inputs.  (Grrrrr.)
>
>I figure I can either cannibalize the receiver and look for a line level
>input to bring out to the case, or I can pad the output from the CD 
>down to phono preamp input level.  I realize this is a bit of a crock, 
>but it'll be nice for her to be able to record some CDs, and to listen
>to some of my favorites at her house.
>
>Could one of you with spare time and access to the standards for stereo
>input levels give me values for an H-pad or L-pad that would drop the 
>level and match the impedances?
>
>-- 
>Mojo
>... Morris Jones, MicroPro Product Development
>{ptsfa,hplabs,glacier,lll-crg}!well!micropro!kepler!mojo

Sorry, Morris, but there is a more significant problem here.  In addition to
being a much lower level input that normal, the phono has an equalizer circuit
(RIAA) that compensates for the unusual was that records are cut (high freq.
are recorded hot, while bass is reduced.)  If you were able to match 
impedances, a CD going through the phono input would sound *bad*.

-- 
John Allred
General Computer Company 
uucp: seismo!harvard!gcc-bill!john