reward69

For those in the know, I'm fixing up an old gmc pickup for my son and had some amps from an old project. I installed a 12" shallow sub behind the seat with a pioneer gm-x942 which has the following specs.


Continuous Power: 100Wx2 (4W ), 150Wx2 (2W ), 300Wx1 (4W )
Frequency Response: 10Hz - 50kHz (0,-1dB)
Total Harmonic Distortion: 0.005% (1kHz, 4W )
Signal-to-Noise Ratio: 105dB (IHF-A Weighted, at 1kHz)
Dimensions: 10-5/8" x 2-3/8" x 9-13/16"


I have it bridge to power just this sub. I also have a pioneer gm-x944 that I would like to power the remaining speakers. It's specs are

Maximum Output Power 500
DIN power output (W)
(DIN45324, +B = 14.4V) 4 x 115 or 2 x 360
Cont. power output (RMS),
14.4V (20-20kHz/4ohms) 4 x 75 (0,04%) W
Cont. power output (RMS),
14.4V (20-20kHz/2ohms) 4 x 125 (0,4%) W
Cont. power output (RMS),
14.4V (Bridged 4 ohms) 2 x 250 (0,4%) W
Cont. power output (RMS),
12V (20-20kHz/4ohms) 4 x 75 (0,04%) W
Cont. power output (RMS),
12V (20-20kHz/2ohms) 4 x 125 (0,4%) W
Cont. power output (RMS),
12V (Bridged 4 ohms) 2 x 250 (0,4%) W
Frequency response 10 - 50.000 Hz
Input level control 400 mV - 6,5 V
Distortion 0,005 (10 W / 1kHz) %
S/N ratio 105 dB
Max. current consumption (A/4ohms) 43,7


I don't want to over power the stock alternator and electrical system and I'm not sure if this would be too much or not. Any help would be appreciated. Btw will be running the 944 in four channel mode powering four speakers.

Windup

I'm not in the know.
I have a 1975 Chevy, I think my stock alternator is only 43 amps (no AC). You should be fine with an 60 amp alt, 80 amps if you have AC or run a bunch of lights.

Richard75013

Look at the sticky this forum section (up 1 level from here) with subject basic wiring. In the 1st link or maybe in 1 of the others there is a calculator to determine amp draw based on equipment and wiring.