My Vette is hissing at me!!

[SuperchargedRS 10+ year member]

Hey guys, long time no post!

I recently got a C6 Corvette, no onstar, no bose.

Replaced the stock HU with a new Pioneer X940BT, using the GMOS-04 chit show interface, all speakers and amps are stock, I didnt use the RCA harness for the pioneer at all, minus the mute/bypass trick.

Made all my connections with solder and heat-shrink, however I have a hissing out of my speakers even when the unit on mute or 0 volume (like faint static), when I try to play a track with some bass and turn it up (nothing crazy) I get distortion.

Any thoughts from the gurus of audio???

Thanks!

-S

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[DaveVT 10+ year member]

Sounds like a grounding issue.

 

[West]

I have an x930bt and really hate the sound out of it.

I am a bit confused here reading this... Does the car have stock external amplification?

Or is the deck powering the whole show?

 

[SuperchargedRS 10+ year member]

The car has a stock external amp that the GMOS-04 is utilizing (http://www.sonicelectronix.com/pdf/metra/met-gmos04.pdf), All my grounds are done through the harness via solder and heat shrink.

 

---------- Post added at 03:26 AM ---------- Previous post was at 03:25 AM ----------

 

Vette is a 07' btw

 

[West]

The car has a stock external amp that the GMOS-04 is utilizing (http://www.sonicelectronix.com/pdf/metra/met-gmos04.pdf), All my grounds are done through the harness via solder and heat shrink. 

---------- Post added at 03:26 AM ---------- Previous post was at 03:25 AM ----------

 

Vette is a 07' btw

OK why not try the RCA harness? Does the GMOS have a gain control on it? If you use the RCA's you may be able to adjust the gain which can help remove the noise/distortion...

You can still check the ground with a dmm it couldn't hurt.

 

[akheathen Premium Member]

have you connected the head unit remote output to the appropriate connection to turn on the amp? it needs to be connected for the amp to work. check a speaker lead. it should be biased to +6vdc, or close when on.

 

[SuperchargedRS 10+ year member]

The amp trigger is done through a spdt relay per that manual I linked to, I played with the setting screw on the gmos to turn down the volume of the door chime (which also has bass in it now!?).

Hmmm