Out of ideas. Audio Gurus please help. - Chevy Impala SS Forum
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post #1 of 13 (permalink) Old 10-08-2002, 11:34 AM
Captain Crankshaft
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I'll explain the situation:

1995 Caprice
Sounded "fine" with factory speakers and Pioneer DEH-P47DH.

Bought Ininity Kappa 62.5i for the front doors.

The wiring from the head unit to the plug coming out of the door was unmodified.

The plug on the factory speaker was cut off and soldered to the appropriate crossover leads from the ininity speakers.

Passenger speaker sounded fine.

Replaced door panel.

Next day did driver's side.

Installed speaker the same way as the passenger side.

Replaced door panel.

Test (I know, DOH! Door panel should be off [img]redface.gif[/img] )

Anyway, the passenger speaker now sounds really bad. Tinny, extremely weak etc.

I was told this is a symptom of one being wired out of phase. However, we have double checked the wiring and it all appears correct.

Now, I'd chalk it up as a bad speaker or a bad x-over, but this exact same behavior is going on with the rear speakers in my brother's wagon.

Any ideas, fellas?

Mark / CC
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post #2 of 13 (permalink) Old 10-08-2002, 11:43 AM
jelzey
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Does the head unit go to the OEM amp and then to the speakers like the BOSE sound system? If this is the case then it might be due to the fact it already had crossovers in line before you added yours and the ohms are different for the BOSE setup. Don't know how things are wired up between the HU to the speakers.
post #3 of 13 (permalink) Old 10-08-2002, 11:53 AM
Captain Crankshaft
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I don't think I had the Bose system. My speakers were just little junky things that didn't say Bose on them.

When we installed the head unit, we just used the appropriate adapter harness. If there in an amp somewhere along the line, I don't know about it. I'll be taking the dash apart again very soon (running an amp) and I'll look for a factory amp while I'm in there.

Any other advice, Twig or other audio people?
 
post #4 of 13 (permalink) Old 10-08-2002, 12:11 PM
jelzey
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On my caddy the amp is in the trunk up against the seat and the actual headunit (body of) is under the antenna. The piece in the dash is just a control unit.
post #5 of 13 (permalink) Old 10-08-2002, 12:38 PM
gbelli
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Try swapping the speakers over [img]smile.gif[/img]

If it follows the speaker... theres your problem. If it stays, its wiring, and if it works, leave it alone [img]tongue.gif[/img]
post #6 of 13 (permalink) Old 10-08-2002, 12:48 PM
MOORESS
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also you could try turning the bass up and the treble down ..then adjust the balance left to right if it has more bass when balance is to one side than when it is centered you have a speaker out of phase .. that is the most simple way to check phase
Later
Donnie
post #7 of 13 (permalink) Old 10-08-2002, 01:14 PM
Captain Crankshaft
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MOORESS, thanks, I'll try that when I get home.

Is a speaker out of a phase a more subtle thing? The problems we are experiencing are quite pronounced. It litterally acts like one speaker is getting 1/10 the power the other is getting.

One is louder than the other, one has full range sound while the other lacks any bass etc. Very noticable.

What are the chances that out of 2 separate orders of infinity speakers one set of 6.5" and one set of 6x9" that each set has either 1 bad speaker or one bad X-over?

If that's the case, I'm buying a lottery ticket tomorrow [img]3.gif[/img]
post #8 of 13 (permalink) Old 10-08-2002, 01:26 PM
MOORESS
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<BLOCKQUOTE>quote:</font><HR> What are the chances that out of 2 separate orders of infinity speakers one set of 6.5" and one set of 6x9" that each set has either 1 bad speaker or one bad X-over?<HR></BLOCKQUOTE>

Very slim
post #9 of 13 (permalink) Old 10-08-2002, 01:27 PM
bbodyguy
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Could be bad wire job, if you are not the origonal owner, maybe someone else did somthing weird? It would not be to much effort to run new wire from the doors to the head unit.
But the same thing happened to me. It turned out that the POS speaker that I put in to replace the stock one had a peizo (cheap!!!) tweeter in it. A few days after I put it in, it sounded *real* weak, and very crummy across the whole freq. spectrum. It turned out that the tweeter had a dead short in it, and since it was a peizo type, their was no capacitor crossover to help mitigate that failure. Bottom line, replaced the POS speakers w/ quality ones, and the problem went away! I found the dead short by using an ohm meter @ the head unit connector. Meausure both sides, and make sure they read the same. If they dont, your on the road to wireing, or speakers.

Peter May
post #10 of 13 (permalink) Old 10-09-2002, 07:15 AM
chevmdnss
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Just a quick note on the 2 sets of Infinity speakers having something wrong theory. I have a guy here locally that has a 4x4 pallet 3ft tall of bad infinity speakers from Cir.City and Best Buys. Seems like they had a small problem with those recently.
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