I'm replacing the entire sound system on my 2004 G35 coupe (Kenwood HU, Alpine 6-1/2" component fronts, Alpine 6x9 back and Alpine 10" sub). I was just trying to figure out if I'm gonna need spacers for the the front speakers. Here are the dimensions:

Alpine SPR-60C

Dimensions
Tweeter Mounting Diameter (mm): 37.9mm
Tweeter Mounting Diameter (in): 1-1/2''
Tweeter Mounting Depth (mm): 19 mm
Tweeter Mounting Depth (in): 3/4''
Woofer Diameter (mm): 165mm
Woofer Diameter (in): 6-1/2''
Woofer Mounting Diameter (mm): 136mm
Woofer Mounting Diameter (in): 5-3/8''
Woofer Mounting Depth (mm): 59mm
Woofer Mounting Depth (in): 2-3/8''
Crossover Size (mm): 63mm x 32mm x 24mm
Crossover Size (in): 2-1/2'' x 1-1/4'' x 15/16''

Excuse my ignorance but it's my first time doing this and just want to make sure I have everything needed before I start taking everything apart. Any help or info would be appreciated.

 

You need spacers. You can modify the stock speaker spacers, but they are pretty flimsy plastic that won't stand up to well-amplified speakers. MDF spacers are the way to go. Either cut your own or pick them up from zenclosures - http://www.zenclosures.com/Speaker-Spacers-s/36.htm

 

Thanks for the response! Exactly what size would I need to order from Zenclosures?

 

So closest without being too small to that which zenclosures does is 5.5" center hole.

 

Thanks again! I really appreciate your help! One last question... I found these on Amazon:

http://www.amazon.com/gp/aw/d/B007ZQ...453704&sr=8-14

Just want to make sure these will work like the Zenclosures would since they're cheaper.

 

They look like they'd work fine, but the don't look as sturdy as MDF. Just be sure you run some felt tape under those plastic ones, otherwise, that's a huge potential source of squeaks.