I have 2008 G37 coupe,
not sure if it's boss or not, but anyways, I plan to replace them all anyways..

I have W6 subs ready to go to trunk..
planning to get 4 channel amps and get new speakers,,

Any recommendation for speakers?
or how big is the front speakers..?

Any suggestion for 4 ch amps to produce better audio..?

Since I cant use my deck, im so depressed,,
and I need any expert's suggestion..

Please help..

 

Depends on your budget.

 

find an audio processor in your budget. Most decent processors are around $400-1000+
You could go the line out put converter route but you wont get the best signal/sound.

speakers...budget, what type of music do you like. Do you want component speaks
or co-ax?

There are a ton of 4 chan amps. Budget and how much space are you willing to give up?

Are you planning on running the 4 channel in 3 channel mode? AKA the front two channels power the left and right front and the rear channel is bridged to power the sub?

 

I'm planning to get 4 ch amp only for the front, my sub has other amp that will go through just for itself.
I want to find out good amp that would get me the better sound system, any brand you would recommend for 4 ch amps? my budget is around $ 500-700 for 4 ch amp and front speakers.
and if possible, i would like to get speakers with components. = (
Sorry about being newbie.

 

and how big is the front speakers for 08 g37?
anyone knows..? TT

 

I think for $700 you should be able to put together a respectable system, I didn't spend much more than $700 on my system for my Sedan (I know you have the coupe).

I bought:

Audiocontrol LCQ-1 Sound Processor $200 (ebay)
50W x 4 Alpine MRP-F300 $150 (crutchfield)
Polk db651 6.5" Coaxial (rear door) $60 (ebay)
Alpine Type-S SPS-610C (frnt door) $75 (ebay)
Polk Audio DXi350 (frnt door) $30 (crutchfield)

All the above is $515, for $200 more you can buy the Infiniti Basslink Sub for added bass at a minimum loss of trunk space.

The system sounds much better than factory, I also added sound dampening layers all in the trunk/qtr panels/rear doors/frnt doors. The sound dampening
makes a big difference. The sound dampening was about $200 so I guess technically I did spend close to $900.