It suppose to be a 200 watt HU so I would think it is 50x4 at 2 ohms.quickturbo said:I searched the forum but could not find the answer. Does anyone know what the factory radio wattage output is from the headunit per channel??
What are the two options?quickturbo said:I was hooking up a line out converter and it had 2 different inputs for different wattage head units.
correct and that is peak power not RMS... so 30 x 4 for the front(door and dash tweeters together) and side speakers. 40 x2 for the rear shelf subsLothar34 said:What are the two options?
I believe that 200W advert does include the 80W sub amp, so that means 120W max for the head unit, which isn't any more than most head units.
Flashpoint said:correct and that is peak power not RMS... so 30 x 4 for the front(door and dash tweeters together) and side speakers. 40 x2 for the rear shelf subs
Lothar34 said:The chip used in the headunit is a TDA7454:
RMS 30W x 4 @ 2ohm, 1%THD
In the sub amp, there are two TDA7396s:
RMS 45W x 1 @ 2ohm, 10%THD (at 1KHz, the subs should be crossed over well below that)
The "max" power for all those is 390W. So I guess Pontiac really was correct to claim 200W.
What gets me though, is that I don't see anything resembling a crossover in the subwoofer amp. There are a couple inductors in there, but they're connected straight to the fuse, so those have to be for the power supply. Were we wrong about those subs being crossed over? Did anybody ever check, or did we all just assume that they were?
Also, the capacitor on the tweeters (the ones in the dash and the coax pair) is 10uF. At 2ohms, that would cross them over at 8000Hz. That's pretty damn high. I can only figure they did that because the impedance of the woofers at that frequency would be high enough that it wouldn't overload the amp up in the range where both speakers are being driven. I can't believe I left those damn tweeters in the dash for so long...
There is an external amp for the rear shelf bass speakers. It is in the trunk on the left side between the quarter panel and the trunk.is there an actually amp in the car that i can get access too, and if there is can someone tell me where it's located?