12-13-2015 | #1 |
Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
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Anyone knowledgable with radios and speakers?
Now that I put everything back together--starter, coil packs, ported plenum , IHs I turned on the radio......
It's an aftermarket JVC ( came with the car) when I turned it on I get a VERY loud piercing sound coming from what I guess are the rear speakers.....It basically sounds like an air raid siren, very loud and can't be controlled with the volume button....Radio controls work but the sound does not go away at all.. Before I bring it to a radio place I figure maybe one of the members went through this problem... Thnx John.. |
12-13-2015 | #2 |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,707
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Re: Anyone knowledgable with radios and speakers?
Need a bit more info. Are you running OEM speakers and amplifiers? Are all speakers shrieking? Just the rears? Use balance and faders and check if any or which speakers are working.
My guess is JVC head unit was spliced into OEM CDM and your CDM probably gave up the ghost. |
12-13-2015 | #3 | |
Join Date: Nov 2014
Location: Brooklyn ny
Posts: 1,045
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Re: Anyone knowledgable with radios and speakers?
Quote:
Sound is unbelievably deafening and can't be controlled with volume controls... |
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12-13-2015 | #4 |
Join Date: Dec 2007
Location: NYC
Posts: 1,182
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Re: Anyone knowledgable with radios and speakers?
If you have a factory Amps they sound like they are bad it will cost you about 100 bucks to get refbs.
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12-13-2015 | #5 |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,707
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Re: Anyone knowledgable with radios and speakers?
Not necessarily. Cadillacs, Nissans, and Infinities of the era used the same amps. When removed from a Corvette - expensive. When pulled from the others - not so.
http://www.ebay.com/itm/Pair-of-Bose...AAAOSwAKxWa5F1 Above posting are fronts. Rears are about the same $25 to $50 each. |
12-13-2015 | #6 |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,707
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Re: Anyone knowledgable with radios and speakers?
Based on my experience, if amps are bad, particular speaker sound will be low along with popping sound. Bad CDM caused shrieking sound as mentioned.
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12-14-2015 | #7 |
Join Date: Jan 2015
Location: Marietta, GA USA
Posts: 1,160
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Re: Anyone knowledgable with radios and speakers?
A thought: It might be easiest to forego the original Corvette components and buy new speakers (and possibly amps). The Bose speakers are very good, but it takes a bit of effort to get an aftermarket head unit to work with the original speakers, sometimes more work than it's worth.
Having said that, I have an aftermarket HU with original speakers and I'm very happy with the sound. |
12-14-2015 | #8 |
Join Date: Jan 2011
Location: Long Island, New York 11542
Posts: 143
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Re: Anyone knowledgable with radios and speakers?
Go thru the settings on the JVC Radio.
if you had disconnected the battery during the plenum service the radio may have gone back to its default settings Is it from both rear speakers? i can't see both amp going at the same time. any problems with the front?
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1995 ZR-1 Red / BLACK NCRS NATIONAL WINNER DAVE HILL AWARD TOP FLIGHT & PV AWARDS Currently in my Stable: 1978 PACE CAR L-82 4SPD "Triple Crown Winner" 1979 TRANS AM Bandit Edition 400 4 spd WS6 Y84 W72 1981 PORSCHE 930 TURBO 1995 ZR1 Red / Black 2004 Z06 Yellow / Black 2010 C6 Grand Sport Convertible Red/Black |
12-14-2015 | #9 |
Join Date: Apr 2008
Location: Gainesville GA
Posts: 232
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Re: Anyone knowledgable with radios and speakers?
As far as amplifiers go here is my experience with them. When I first purchased my car the radio and speakers did not work. I pulled the radio and sent it off for repair. After the repair everything worked for a while and then the front speakers failed. At that time I decided to go aftermarket with a new head unit and aftermarket speakers. In truth once it was done I was never fully satisfied with it. Sold off the aftermarket equipment and sent the front amps off for repair. Installed the repaired amps and man the system sounded what I thought at the time was really good. Later the rear amps fail. So off to the repair shop and guess what? The repair shop called and informed me that they were not correct for the car however they were correct for a Cadillac. I talked to them about the differences and in general here is what was said. Each amp is tuned for the car and the placement within the car. Amps from other cars cannot be interchanged and have them expect to sound anywhere as good. Each car amp is made differently and will put out different signals based on several things: placement, cabin of the vehicle, speaker size, enclosure size and power. You should not mix and match Bose amps because there is on-board equalization, which means the soldered components on the board create the desired tuning specific to the car it was originally installed. We made a deal and they sent me the correct amps for the Corvette. Once installed the system sound much better than before the rear amps had failed. This is just my $0.02.
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12-14-2015 | #10 | |
Join Date: Aug 2006
Location: McLean, VA
Posts: 3,707
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Re: Anyone knowledgable with radios and speakers?
Quote:
As for each amp being equalized based on different models and even coupe vs. convertible is true. This especially is true if using OEM head unit because Delco-Bose head unit has very limited equalization control. However, if using an aftermarket head unit with better eq. control, this is not a major deal. I sopped being fussy over "front" vs. "rear" and Corvette amp vs. Cadillac amp vs. Nissan amp. I've ordered 2 x Cadillac 100 watt Bose amp for my fronts. |
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