[ThomasKenyon]

Well, the factory MKIV system consists of a headunit with just a low voltage signal comming out. That signal is sent via a harness to a small 5 channel amplifier under the passenger seat. The amp then powers each of the 5 channels. (The front tweeters and the door mid are wired in series)

With a few more questions, I should be able to hone in on your problem.

When the front speakers "fade out" is it both at the same time or does one go out and then the other??

Does the "fading" out occur gradual or abruptly?

When all speakers are playing, do they sound OK or do they sound distorted?

Do the speakers fade out at high volume or at any volume??


I have seen both the factory headunit and the amplifier have problems similar to what you have described.

More than likely it is either of the two and not the speakers themselves causing the problem.

Thomas Kenyon
Custom Sounds
San Antonio, Texas

 

[ThomasKenyon]

Sorry for the long delay... musta been side tracked.. sorry.

Well, after reading the description of your problem I am really leaning to the factory amplifier being the problem. I believe this to be the problem because of the fact that the speakers (when they play) sound fine. I have seen this problem before in Lexus' and Supras that use the same setup.

As far as the tying into a new amplifier.... yes, it is possible. I would however, use a line level convertor on the signal side so that you can adjust the signal going into your new amplifier easily. Any decent small 5 channel amplifier will do a good job and if you want, I could sell you a stock Supra amp and return it for a refund if it wasn't the problem.

Call me at the shop and I'll try and help you out!!

Sorry for the delay!

Thomas Kenyon
Custom Sounds
San Antonio, Texas
210-340-4000