Need Advice For Speaker Installs

[shiner-blue]

I have a 2008 GMC Sierra SLT Crew with Bose system. I installed a Pioneer navigation head unit a few years ago. I know want to replace the factory speakers. One in each door and in the pillars where the tweeter is for the factory component system.

 

For the front doors and the tweeters int he pillars I plan to use a 6 1/2 Infinity Component system.

 

1. Should I use the supplied crossovers that come with the speakers or just connect them to the factory speaker wires? Would the factory crossover work?

2. If I use the factory crossovers how and where should I install the crossover and run the new wires?

3. Any input on mounting the new tweeters to the factory pillar holes and grill?

4. Should I just use Coaxial speakers in the front doors and just keep the Bose tweeters

 

I plan to use 6 1/2" Infinity Coaxial in the rear doors.

1. Any input on the method of mounting these?

[aesalazar]

Just got done doing my 09 a few months ago. I am not expert but can at least give you my $0.02.

 

1. I would definitely stick with the supplied crossover. There is alot of engineering that goes into the xover matching the speakers, they are designed to work with each other specifically. If could try using the factory but I would be REALLY careful, who knows what is in the BOSE design.

 

2. I assume you mean if you use the supplied xover, not the factory. I ended up putting in my door which they say NOT to do because they could get exposed to weather. A very valid point but I couldnt see anywhere clean to put them on the drivers side without simply jamming it in there. I used thick industrial velcro to actually mount it to the doors so there is some separation from the door. And I put it as far forward in the door as I could so it wasnt right under the windows. Worked with my other vehicles...

 

3. Whats the diameter of the tweeter. If it is like 3/4" it will probabably fit in the OEM location, just need to fix it in there with tape or something. If it is bigger, you are probably going to have to carve up the OEM diamond grill thing to make room. Thats what I did. Then I used a combination of eposy glue and dynamat to hold the mount that the new tweeter came with to the A-Pillar. Not the prettiest but solid and it will never be seen once it is all back together.

 

4. I would not mix tweeters like that. You will probably get a funny sounding system. Cancellation, different SPLs (ie loudness), etc. If you want it to sound as best as it can, stick with one.

 

On my extended cab, the rears are a pain. They use this odd bracket. I have seen pics of people mounting 6x9s back there but there was no baffle behind it so there was alot of open space between the door and the speaker. I didnt bother with the rears since they are so far from the my ears that I didnt think they were worth the trouble. The fronts would overpower them so I put all my money towards them. Not sure what the crew cabs use, I am sure someone has to have info on them.

 

I posted some pics in this post:

http://www.gm-trucks.com/forums/index.php?showtopic=133754

 

Good luck.

 

Ernie

[shiner-blue]

Thanks! Did you have any difficulty running the speaker wires to the tweeters from the new crossover in the doors?

[aesalazar]

Na. Just had to fish it up there. Took a little bit but was pretty straight forward. The hardest part was getting it through the rubber conduit that connects the door to the truck body. Again, not hard, just have to take it off and put a little force behind pushing the wiring through it. The rest is easy.

 

Ernie