7001Re: [BCD396XT] Re: Fried It I think
- Oct 7 3:08 PMIf you will only accept an answer from UPMan, that is fine. But, I will
tell you that you shorted one side of the speaker to ground and
increased the load on the audio amp. Again, if you don't want to believe
me that is fine.
I will let you know that many radios do not use speakers that are
grounded on one side. It may not be common knowledge, but it should be.
Never assume anything about radio design.
As for speakers, the colors can be anything the manufacturer puts in
them. It's usually what is supplied by the speaker manufacturer (who has
no idea what they are being connected to). I've seen black/red, two
blacks, two whites, two greys, yellow/gray, Etc. Sometimes one side of
the speaker was grounded. Often, it is not.
Why didn't you use a meter to check the voltages between the points you
were connecting? (often if there is a voltage difference it's not a good
idea to connect those points)
Here is one more common error that ill-informed people do: They connect
the ground side of a mobile radio to the battery. NEVER do that. I had a
competitor install a commercial two-way radio in a vehicle this way. The
vehicle lost the ground between the chassis and the battery. Guess where
ALL the starting current went; Right through the radio's ground wire
which was the only path left. It literally fried the radio and they are
lucky they didn't burn the vehicle up. Just another one of those things
that should be common knowledge, but isn't. Some will say if you fuse
that like, it makes it OK. It still isn't OK. Just connect the ground
side of the radio to the chassis.
I know none of this does you any good at this point, but maybe it will
help the next person. When in doubt, ask first. I'm pretty sure the
manual does say to not ground the speaker.
> I realize you said it was a rhetorical question, but I had to respond here.
> I guess I would connect it that way because it was my understanding that it IS ground.
> Doesn't the black wire on a speaker indicate "ground" and the red, "signal"?
> Apparently not . . .
> Some lessons you learn the hard way . . .
> I wish I was more informed about that sort of thing. It doesn't appear to be common knowledge . . .
> Perhaps UPman could explain what I did and why I shouldn't do it.
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