I've got the factory speakers in my '89. 6x9 in the back. Powered with a small Pioneer amp (GM-X372 240W 2ch). The deck is an Alpine CDA-9847

A few days ago I noticed that the bass tones coming out of the 6x9 diminished severely. No distortion, but when I crank the bass up on the deck, it's not nearly coming out of the speakers as it used to.

I checked the settings on the amplifier and they are in the same position as I last left them.

Do/can speakers just lose bass output without sounding blown/distorted?

 

Is the large driver (the 6"X9" one) in the 6X9 moving? Also check the setting on the deck.

 

well you shouldnt be getting bass from your 6x9s. Get some subs! You can tune your head unit/amp to make them have more bass though.

 

The settings in the deck are set to give the 6x9 more bass.... my point is... something changed... and now there is less bass.

I know it's not window vibrating bass but that's what I've got in my '89 which is my daily.

I can pull the panel and check to see if it's moving.

 

sometimes i experience the same thing from my 6x9s. but i upgraded mine to the alpine 3 ways, and put dynamat in while installing them. i know i should get subs, but money is low when you are in school full time, work part time and love to travel like i do

 

Agreed... Work Part time and school full time.

Did the upgraded speakers solve the problem? What did you have before the upgrade?

 

if it's all-the-sudden, I've got two thoughts...

1) the solder connection came off of one of the speakers to the main woofer voice coil (which at that point, there'd be ZERO bass coming from this speaker,) or...

2) if both 6x9s are doing it, (all-the-sudden,) then it can be your headunit...

 

I just found this about my amp this morning.

Pioneer Car Amplifiers Require Replacement


Affected Models Include GM-X372, GM-X374, GM-X572, GM-X574, GM-X972


Long Beach, CA March 17, 2003

Pioneer Electronics (USA) Inc. today announced that five of its aftermarket car amplifiers require replacement to avoid potential short-circuits that may cause the amplifier to become inoperable. The models affected include three two-channel amplifiers: GM-X372, GM-X572 and GM-X972 as well as two four-channel amplifiers: GM-X374 and GM-X574. Consumers who own any of these amplifiers are encouraged to contact the dealer where they purchased the product for a free repair or replacement. Pioneer is not presently aware of any fire or other safety hazard caused by this issue.

"We sincerely regret any inconvenience this issue may cause our consumers," said Hiroaki Matsubara, president of the Mobile Entertainment Division of Pioneer Electronics (USA) Inc. "Pioneer strives to provide the best possible mobile entertainment products for our customers. We are taking all steps appropriate to ensure a smooth replacement of these amplifiers."

More information about this issue is available on www.pioneerelectronics.com or by calling Pioneer's toll free customer service line at 800-421-1636.

Pioneer Electronics (USA) Inc. is headquartered in Long Beach, Calif., and its U.S. Web address is www.pioneerelectronics.com. Its parent company, Pioneer Corporation, is a leader in optical disc technology and a preeminent manufacturer of high-performance audio, video, computer and cable television equipment for the home, car and business markets. Pioneer Corporation focuses on four core business domains including DVD, display technologies, Digital Network Entertainment? and components. Founded in 1938 in Tokyo, Pioneer Corporation and its affiliates employ more than 31,000 people worldwide. Its shares are traded on the New York Stock Exchange (NYSE: PIO).






emailed them, and they said I needed to call directly.

Hopefully that's it. The headunit is only a few months old, and my first experiance with Alpine.

 

That problem makes the amps not work at all. Do you get anything from the 6x9?

 

Yep. It just sounds like I turned the bass down halfway on the deck... that's what the equivilant would be like.

 

before the i put in the alpines, there was these really crappy polk audio speakers in there from one of the previouis owners. the alpines instantly sounded better, but now i am thinking of going with pioneer for teh 4x6s. im pretty sure its just my head unit cant power them well enough for their power range. so an amp is definitely in the near future for my car. if only it could happen tomorrow when i get paid....

 

Could be that a power supply cap popped in the head...could really be the case if this product line has known issues.

If you pull the head and take it to a <i>friendly</i> Best Buy, they may be able to test it for you for free.

 

Power supply cap wouldn't cause this. Could be the HU though. Try and put the old 6x9s in. Check and double check ALL the HU settings. Again, is the 6x9 portion of the speaker moving? It is both sides, right? Did you have BBE on before? Is it still on? Are you amping the rear speakers or running then off of the HU?

 

I'm referring to a PS cap integral to the head's internal MOSFET amp. Seems only halfway likely, but still possible.

 

NEEDAZ, do you use BBE? for some reason I actually like it, when I put it on the lower levels available...