Re: [T3] Two into one speaker

["Keith Park" <TopNotchResto@worldnet.att.net>]

Depends on weather the coils are wound 1 over the other or 1 above the
other (more likely) The magnetic feild remains consistant but the 2 should
sum the signals inputted.  Sounds like a gimmick that might even have some
strange distortion characteristics.  Hmmm.. never fiddled with these.

Keith


----------
> From: Jim Adney <jadney@vwtype3.org>
> To: type3@vwtype3.org
> Subject: Re: [T3] Two into one speaker
> Date: Sunday, May 30, 1999 4:49 PM
> 
> On 29 May 99, at 17:16, Per Lindgren ью 
> > Jim Adney wrote:
> > 
> > > On 28 May 99, at 10:01, Dana Hall wrote:
> > >
> > > > There are some manufacturers that make a Dual Voice coil speaker
for
> > > > this application. I think the last one that I saw was at Radio
Shack.
> > >
> > > I have not seen this kind of speaker, but it might exist. Such an
> > > arrangement would remove the possibility of a DC short from unit to
> > > unit, but all the AC drive from one would still be imposed on the
> > > other. I really don't know whether this would hurt anything, but it
> > > really doesn't sound like a good idea.
> > 
> > Jim, this is  a good idea, you get stereo sound out of one speaker, but
it
> > sounds as mono. This has been done in car stereo for ages, not so much
in
> > regular speakers, mostly in subwoofers. There is no possibility of a
short,
> > as the two coils are spearated from eachother. I would say that the
dual
> > voice coil speaker setup is just as good as two separate speakers.
> 
> I understand that this arrangement should give you a SUM of the 2 
> channels, but this is not the same as stereo. For low freqs, however 
> there should be very little difference. I understand that there is no 
> direct connection between the 2 coils, so there is no possibility of 
> a DC connection, but since the 2 coils share a single magnetic 
> circuit, any AC component imposed on one should show up in equal 
> magnitude on the second. I think this should work exactly the same as 
> a transformer.
> 
> Keith, what do you make of this? Do these share a magnetic circuit?
> 
> Jim
> -
> *******************************
> Jim Adney, jadney@vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
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