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From: gaspo@ds1.scri.fsu.edu (Scott Gasparian)
Newsgroups: comp.sys.ibm.pc.hardware
Subject: external speakers
Message-ID: <1034@sun13.scri.fsu.edu>
Date: 7 Oct 90 00:08:51 GMT
Sender: news@sun13.scri.fsu.edu
Distribution: comp.sys.ibm.pc.hardware
Organization: SCRI, Florida State University
Lines: 40

awhile ago, someone posted a little schematic about hooking
up an external speaker to your pc.  Since my machine is
so old and the internal so wimpy I did.  Here'swhat I found out.

The original suggestion to hookup a line level output with a 4.7uf
cap worked if and only if I leave the original 8ohm speaker in
place.  Removing the speaker just gave a lot of noise vaguely
resembling listening to a modem connection.

I think the problem was with the resistence of the internal speaker.

So, what I did was hookup an external speaker (8ohm) and then tap
the cap off into a line out.  Needless to say, 40 watts can make
even the boringest games much better.  

Schemeatics:


pc - -------------o--------------------------------  rca ring
                  |  
              (8ohm speaker) 
                  |              4.7uf elec cap
   + -------------o------------|(------------------- rca pin


I haven't tried just putting in an 8ohm resistor, since
this setup works fine for me.  This way, I still have a speaker
connected all the time, and can turn on the amp when I
want to have some REAL sound.

BTW, old zenith 248 (286@8mhz)

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