Run two wires (try 12 ga) temporaraly (power and ground) from the radio to the battery. If the problem goes away the wiring to the radio is not heavy enough to provide enough power to the radio at high volume levels. David Teitelbaum vin 10757 --- In dmcnews@xxxx, "Hank Eskin" <henry@xxxx> wrote: > > 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