Date: Mon, 25 Jan 93 1:39:20 EST
From: dionf@ERE.UMontreal.CA (Francois Dion)
Message-Id: <9301250639.AA27136@brise.ERE.UMontreal.CA>
Subject: Franky in surround
To: Ultrasound Daily Digest <ultrasound@dsd.es.com>

Ok, you have read the 3D thing, and you cant wait. You want big sound. The
only possibility for now is surround. Now surround cost a lot of money,
and it will not be useable anymore once you get the 3D driver. Wrong.

Now, i hope you have an amplifier, cause if you dont, you cant use this little
hack to get surrounding sound. WARNING: i am not responsible for any
damage resulting from the use or misuse or anything else related to this
circuit. Check that your - posts are connected to ground and not the +. If it's
the case reverse the connections to the amplifier.

It works surprisingly well considering the cost. Have fun!

| Amplifier |
| + -   - + |   You connect the front speakers as usual (dont mixup
 /| |   | |\    the polarities!)          _
| |_|   |_| |   FLS: Front left speaker (/_\)
| /_\   /_\ |   FRS: Front right speaker
| FLS   FRS |   R: variable pot 50 ohm. 10 watts or more (depends on
|_         _|      the amplifier)
> |       | <
><'R     R'><    RLS: Rear left speaker (use a much smaller speaker
>           <         for rear than front. 8 ohm also.)
| RLS   RRS |    RRS: Rear right speaker (")
|  _     _  |
| \_/   \_/ |    the 2 - on front speakers are connected to the
|_/ \_._/ \_|    ground of the amplifier internally, so you dont
 +   -|-   +     have to connect them.
      |_
      > |
      ><'R
      >          Here, you do need to connect the 2 - thru R to the
     _|_         amplifier ground.
      -  AMP GND

Put the 3 potentiometer in a box so that you have the control in one
place, and use enough wire so you can move with it. You'll have to
experiment so that the R going to ground is a little higher than the
other 2 and once that adjusment made, the other two must be adjusted
so that the rear speakers are just adding a touch of depth (if you
turn them off, you notice that the surround is gone). Also, if you
have A-B speaker selection, plug the rear speakers on the + of B
instead of A, you will then be able to switch them off easily.
Of course, when you will use the 3D audio, it will affect the signal,
so it's better to unplug the rear section. But for your video, tape,
CD and regular GUS, you will still find it cool.

Ciao,
--
Francois Dion
    '  _   _   _
 CISM (_) (_)  _) FM       Montreal , Canada       Email: CISM@ERE.UMontreal.CA
      (_)  / . _)             10000 Watts          Telephone no: (514) 343-7511
_______________________________________________________________________________
Audio-C-DJ-Fractals-Future-Label-Multimedia-Music-Radio-Rave-Video-VR-Volvo-...