Late Model GM Truck

[bayless]

Just put a lot of money in a system for my 08 GMC Sierra. Good quality components. Sounds terrible. A real hollow, tinny, harsh sound from all the door speakers. Put a lot of sound deadening material on outer skin, inner skin and door panel itself. May have helped a little but not near enough. Just wondering if anyone else has fought this. I have adjusted everything over and over....and over. Just cant get there. It really seems like I am fighting the acoustics of the truck and not the stereo itself. Any suggestions would be greatly appreciated. Thank You

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[oxsign 5,000+ posts]

Are they on an amp or just the HU? What HU are you using? More info please.

 

[trumpet 5,000+ posts]

Have you verified all speakers are wired to the same polarity? Does it sound that bad in every seat? I second the need for more information as oxsign asked for.

 

[jrdnhsnbrg 10+ year member]

1. What speakers are you using?

2. What head unit are you using?

3. Are the speakers on a stock amplifier?

4. If not, are they on an aftermarket amplifier?

5. Are you sure they're wired correctly?

6. Did you run all the wiring yourself or use stock wiring?

 

[bayless]

Pioneer AVH-X1500 DVD, 4-Focal P165V15, 2-10" Focal P25s, Arc Audio XDI 805 amp. Used stock speaker wires on doors. It does sound the same in all seats. I was listening to a podcast today and noticed the same bad sound when people would talk, even at low volume. It really does sound like the doors resonating, but not 100% sure. The guy that installed it is good, with 15 years of experience. I think he is tired of me.

 

[jrdnhsnbrg 10+ year member]

Deaden the doors?

 

[bubbagumper6 5,000+ posts]

May need more than just regular deadener. Could try MLV & CCF to improve sound quality.

 

[bayless]

Used second skin deadener on the outer inner and door panels, And those rubber speaker tweaker pads behind the speakers. And 1 layer of CCF on outer door skin.

 

[Side Show 10+ year member]

Does it only sound crap when your listening to radio or podcasts? or does it do it on cd's/ipod/usb ect?

whats your tweeters set too on the crossover? -3db?

 

[bayless]

Yes its bad on everything. Tweets set on -3.

 

[trumpet 5,000+ posts]

CCF on the outer door skin is not doing anything beneficial. I'm sorry to say but Second Skin's marketing on that product is misleading, as there is little scientific reasoning behind CCF going inside a door. Anyway, could you post a picture of your equalizer settings on the head unit, or just describe them?

 

[bayless]

View attachment 26546058 this is the EQ setting I use a lot. I have had it all over the board though.

 

[Side Show 10+ year member]

I think you expectations of those speakers is too high.... not too sure what your trying to achive

 

[bayless]

Like I said, I think I am fighting the acoustics of the truck and not the stereo itself. Door panels are a real hard plastic. Was wondering about a spray on undercoating type of sound deadener on the back of these. Anyone ever do this?

 

[bubbagumper6 5,000+ posts]

Used second skin deadener on the outer inner and door panels, And those rubber speaker tweaker pads behind the speakers. And 1 layer of CCF on outer door skin.

CCF on the outer door skin is not doing anything beneficial. I'm sorry to say but Second Skin's marketing on that product is misleading, as there is little scientific reasoning behind CCF going inside a door. Anyway, could you post a picture of your equalizer settings on the head unit, or just describe them?

CCF is used to decouple MLV from the metal. Used by itself it offers almost no benefit as it has very little sound wave blocking capability.