[GCncsuHD]

Originally Posted by jimmydean

2 x 120W @ 2 ohms (12V) from what I can find. Depending on the power rating of the speakers, you could run all 4 with good performance. If the 6x9's need more than 75w rms each, then just run the 6x9.

I wouldn't filter the highs too much on the 6x9s since they are 3ways.

Keep in mind that amp was made well before the CEA standards for amplifier ratings. HiFonics does not even specify RMS or Max ratings for that amplifier, but they do state that it was tested between 11.5-16 volts, rather than the specific 14.4V amps are tested at now. Remember it was likely tested right at that 16v max where it would give the most output although that is not likely where the amp will be operated at. Judging by the overall size of that amp, I doubt it is good for much more than 100 watts RMS at 4 ohms, maybe it would do 150w at 2 ohms, but I would begin to worry about longevity and overheating at 2 ohms as it does not look to be built for great cooling.

And I would filter the highs out of the 6x9s to get the best highs from the 6.5s without interference from the 3way 6x9s screwing with the sound since they are not aimed properly for highs and due to the speed of sound the sound will reach your ears at different times, it is very slight, but it is noticeable. The wavelength of the lows travels differently and aiming for that is not nearly as important.

Originally Posted by custom1970

your right, it is 120w @ 2 ohms (even though i'm not sure what that means) i found some info on the Amp online, apparently it's considered a pretty bullet proof Amp. How would you suggest i wire everything for all 4 speakers? Just hook them up in series left/right each going to a channel or what? I assume this Amp creates a fair amount of heat, but it should be ok under seat?

And GCncsuHD, thanks for the comments, and my truck has also been in the family a while, was originally my grandfathers

Assuming your speakers are 4 ohms, wiring them in series would make it 8 ohms per channel with 2 speakers wired in series per channel. This would greatly reduce the output of the amp. Wiring them together in parallel would make it 2ohms on each channel which would increase the output of the amp, but also create more heat so make sure to mount it in a well ventilated area or it may overheat and cut off unexpectedly.

Good to see these trucks staying in the family, my 67 was bought new by my great grandfather as well