i'm trying to put together a clean, clear sound in my 96 coupe. i dont want to add a sub, trying to keep it stock looking. so here is what i came up with so far from crutchfields. will this all work good together

stock bose head unit with pac aeom-gm21

amp.....Infinity Reference 7540a
111W x 4 car amplifier
Details:

» 4-channel car amplifier
» 111 watts RMS x 4 at 4 ohms (139 watts RMS x 4 at 2 ohms)
» 278 watts RMS x 2 at 4 ohms in bridged mode (4-ohm stable in bridged mode)
» 2-, 3-, or 4-channel output
» variable high-/low-pass filters (32-320 Hz, 12 dB/octave)
» variable Bass EQ (0-12 dB @ 50 Hz)
» CEA-2006 compliant
» preamp- and speaker-level inputs
» preamp outputs
» 8-gauge power and ground leads recommended — hardware and wiring not included with amplifier
» 16-3/8"W x 2-11/16"H x 12-1/8"D
» fuse rating: 30A x 2
» warranty: 1 year

front speakers.....Infinity Kappa 60.7cs
6-1/2" component speaker system
Details:

» component speaker system includes woofers, tweeters, and crossovers
» 2-ohm system impedance (separate amp recommended)
» 6-1/2" Plus One+ woven-glass-fiber woofer with hi-roll rubber surround
» 1" M.M.D. dome tweeter with multiple mounting options
» Starfish™ mounting bracket for easier tweeter installation in factory locations
» 2-way external crossover network (18 dB/octave, 3,500 Hz high-pass and low-pass) with adjustable tweeter output settings
» power range: 2-90 watts RMS (270 watts peak power)
» frequency response: 45-25,000 Hz
» sensitivity: 95 dB
» top-mount depth: 1-15/16"
» warranty: 3 years

rear speakers.....Infinity Kappa 692.7i
6"x9" 2-way car speakers
Details:
» 2-way 6"x9" speakers (pair)
» 2-ohm impedance
» Plus One woven-glass-fiber woofer cone with hi-roll rubber surround
» rotating UniPivot M.M.D. dome tweeter
» computer-optimized outboard crossover with tweeter level control
» power range: 2-110 watts RMS (330 watts peak power)
» frequency response: 35-25,000 Hz
» sensitivity: 95 dB
» top-mount depth: 3-1/8"
» warranty: 3 years

 

I am not too familiar with the c4 rear but you may be able to go with a 6" or 7" midbass or sub in the rear with a small mounting plate made that would allow for a "stock" install look and give you a bit more bass. Clean and clear generally requires some frequency management to the speakers and most multiple range speakers (2 ways/3 ways) struggle with the lower end of the spectrum. Those 6x9's you listed will NOT play anywhere near clear at 35hz let alone 50 hz (about where the "boom" from bass exists in cars). Everyone's perspective on what sounds good varies .. and you could certainly get quite pleasing sound from the above makeup provided you do not ask the system to play what it is not designed for (IE low bass notes).

G'luck
Fej

 

you can fit an 8" in the back of a C4
There are 1/2 Spacers used for the grille

 

jeff, thanks! i never thought about putting subs in the stock speaker holes.
so now i will be putting two 8'' subs in the rear and it looks like i can fit 6x9s in the front rockers. has anyone ever tried to do that in the front.
how will it sound with just 2 subs in rear and 2 6 1/2 or 6x9s in the front.

what are the best 8'' subs, i see you have kickers in yours. would you buy them again?

do i need 2 amps now, 1 for the subs and 1 for the front speakers or can i just use 1 amp for both?

thanks!

 

You are better served making a small template for a 6.5 and tweet combo for the front than trying to make a 6x9 fit IMHO. The sound quality from the components will be far superior to any 2 way 6x9 (linearity of the woofer, distortion of the cone shape etc etc). A 6.5/tweet combo with 2 8" subs will probably surprise you with how good it can sound. If you pick up a 4 channel stable to 2 ohm amplifier you could run the front components with channel 1/2 and bridge the rear channels 3/4 to the 2 8" subs and put about 100 to 150 watts per side to them pretty easily. No external crossover needed the amp should supply the lowpass to the subs. Be sure to invest in some sound deadening in the back area to help minimize the rattles from your new bass

Fej

 

The determining factor will be how much room you have for mounting depth... As far as best 8 " Subs go the JL Audio 8W7 is the best I have ever heard and will handle a ton of power...

 

thanks for the help guys, cause i need it when it comes to stereos
ok so as of now i'm getting 2 8" subs for the rear (thanks jeff)
2 6.5s for the front rockers ( thanks fej)
and for the amp..... i'm lost on which one to get, do i need to match the ohms for the speakers to the amp?
i'm ready to buy evrything now but i dont want to buy the wrong mismatched componets that i probably will without some help
thanks again guys

 

I think the max Depth for the 8s needs to be 4" I used 1/2 thick MDF as mounting plates.

I like the Kickers, they are dual voice coils. I am running 2 amps. one for the 8s and one for the fronts, it sounds really good.

I am using Orion 225 HCCA amps (circa 1992)