1998 Firebird back seat speaker problems.?

[Tommy B]

I have a 1998 Firebird and i recently replaced the back seat speakers, when i hooked them up, they were only producing low frequency noise (not loudly either). I just got the car, and I don't know if they are doing this by design or not... also, it is not the stock deck (receiver) I don't know if this could be causing issues as well..

 

[Oreif]

If the rear speakers are coaxial they are polarized. Try swapping the wires on each speaker and see if that helps. The "+" needs to go to the "+" of the speaker.
If the wires are the stock colored wires, the color codes are listed below:

A Left Front Spkr (-) Light Gray
B Left Front Spkr (+) Tan
C Right Front Spkr (-) Light Green
D Right Front Spkr (+) Dark Green
E Ground Wire Black
F Not Used
G Headlight Dimmer Wire Gray
H Power Antenna Turn On Pink
I +12 Volt Ignition Wire Yellow
J +12 Volt Battery Wire Orange
K Right Rear Spkr (-) Light Blue
L Right Rear Spkr (+) Dark Blue
M Left Rear Spkr (-) Yellow
N Left Rear Spkr (+) Brown