[DML] Re: Speaker "Grounds"

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

In this context a "Floating Ground" is a ground that is not tied to
the frame or the battery directly. In fact it cannot really be
considered a ground, it is more correctly termed a "return". Another
point to be made is that you should have a separate "return" for each
speaker. Most newer amps do not like it if you tie them togther and it
can degrade the sound. You must also be careful to properly "phase"
the speakers. This means the plus to the plus or red terminal and the
black or minus to the other terminal on each speaker. On many newer
amps if you do attempt to ground a return you will blow the amp in
short order. The origional wiring to the speakers is skimpy at best
but the origional radio only outs out 8 watts per channel so is was
fine for it but if you want more power you must up the wire size. In
the origional harness the front speaker returns were tied togther so
you must separate them if you intend to use the origional wires. If
you are going to go through all the work to change the radio and the
speakers, changing the wires to them is a no-brainer. This is in fact
an AC circuit. Fluctuating DC is AC, just with a different crossover
point.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "content22207" <brobertson@xxxx> wrote:
> Marc is talking about the speaker commons, not 12v ground for the unit
> itself.
> 
> Speakers are AC devices, not DC. In the bad old days, there was only
> one amplifier inside a stereo, so it didn't matter if speakers shared
> a common neutral return (amp was just receiving its same sine wave
> back). But modern units usually have separate amplifiers for each
> channel, or at least front & rear. If you tie the returns together,
> amps are going to get screwy polarities back. One is going to be
>






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