AW: [DML] Car audio question..

["Elvis Nocita" <elvisnocita@xxxx>]

Hi Hank,

the "new" generation of radios (not much older than 15...20 years) need two
separate wires
for each speaker. There is no way to have up to 50W on a speaker with this
old technique that radios used more than 20 years ago. I don't wanna bother
you with electronical details, but just connect the speakers to the radio
like the radio's manufacturer writes it in the manual, and you will have the
sound you paid for.

Regards,

Elvis & 6548...almost daily driven


-----Ursprüngliche Nachricht-----
Von: Hank Eskin [mailto:henry@xxxx]
Gesendet: Freitag, 20. September 2002 02:12
An: dmcnews@xxxxxxxxxxxxxxx
Betreff: [DML] Car audio question..



Today I installed my new Alpine radio. I'll spare everyone the details, but
the install went very well, due to lots of preparation and DML research.
But I have a problem.

The radio basically works OK - all functions work - power antenna, proper
illumination, no sparks or shorts, and everything else in the car still
works fine. This radio has a built in 27 watt RMS/60 watt peak x 4 channel
amp, which is powered by a direct connection to the battery (positive and
ground).

Here's the problem: The sound is good upto volume level 14 or 15 (I know
the numbers are meaningless, but it's just a point of reference). That
level is a good, normal level for listening to most things and still carry a
conversation with someone. As soon as I turn it up past that point, I get
increasing amounts of loud static. It's not the speakers clipping, or a
clipping sound at all, the best I can do is describe it as loud static. I'm
also pretty sure it the amount of static is proportional to the amount of
bass in the music and/or the bass setting on the radio.

Here's what I think the problem may be, but I'd like some professional (or
at least knowledgeable) opinions. The Delorean wiring harness for the Craig
radio share a common (-) lead between the front and rear speakers for each
side. (Right common and left common), plus four (+) leads for each speaker
(6 total leads). Of course, the new radio has separate + and - leads for
each speaker (eight total leads). I combined the each of the two (-) leads
for the left and right sides to match up to the harness (8 leads to 6
leads). Is it likely that the combining of these two sets of two leads from
the radio is causing the amplifier to cause this static? Should I go back
in and just wire the speakers directly to the radio leads?

Besides this one problem, the radio sounds great - no hiss or hum or engine
interference, etc.

Thanks,

-Hank #1619




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