[sdiy] Stereo to mono summing..

[John L Marshall]

uncle eric,

How about one 16 ohm transformer in series with the speaker?  The start of
each winding connects to respective channel. The finish tie together, then
on to the speaker, from the speaker to ground. Where have I seen this
before?

BTW I metasonix after the basketball game.

Take care,
John
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----- Original Message ----- 
From: "metasonix" <metasonix at earthlink.net>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Wednesday, July 16, 2003 1:08 AM
Subject: Re: [sdiy] Stereo to mono summing..


> At 11:10 PM 7/15/03 -0400, you wrote:
> >So we're wondering the simplest (cheapest, smallest) way to get both
> signals at the one driver with no loss of volume and with no distress to
the
> amplifier.
>
> An audio transformer with two primaries and one secondary.
> The Mouser 42TM028 would work, though intended for
> 600 ohm loading. An added bonus: phase reversal of one or
> both channels is easily done with DPDT switches.
>
> >This is surely an elementary query for the Synthgods, is it not?
>
> Dunno about them, but the Gods of Early Film Sound used
> specially-made multiwinding transformers to mix audio.
> Cause in 1928 there wasn't no such thing as an audio mixer.
>
> Still the best way, the only thing mitigating aganst it is the cost....
>
> (see, if you study this old tube stuff, you learn arcane things....)
>
>
>
> uncle eric
> metasonix.com
>