Old School Rockford Fosgate Amp Question

[slowfive0 10+ year member]

Hey guys, have an old dinosaur (Rockford Fosgate - Punch 200ix) over here. Want to do a single 8" SA8 v-2 in a foxbody mustang (hatchback). Would like to do it ported in the 30-35hz range.

Just wondering what it could push to this woofer. I've pasted below some information I found....is it accurate and what could it push to a single woofer? Thanks.

11.9V - 100 W RMS x 2, 400 x 1 at 4 ohm, 200 W RMS x 2 at 2 ohm

14.4V - 150 W RMS x 2, 500 x 1 at 4 ohm, 240 W RMS x 2 at 2 ohm

THD S/N >110 dBA>>>

Click to read more...

 

[ewadz3006 10+ year member]

Those amps are under rated. I had the punch 200 dsm (earlier version without the crossover). beast of an amp. loved it.

 

[pro-rabbit 5,000+ posts]

While they are "underrated" they do not do all that much more then rated. I would expect to see around that 400-500 rms range on average. When you hook it up just set everything correctly and you will be just fine.

 

[slowfive0 10+ year member]

Wow!!! That is pretty awesome! I missed the 400-500 "RMS" comment!!!! Are these amps commonly referred to as underrated because they were rated at 12volts (typically) instead of around 14v? Seems like they would want to rate it for would it could put out from a marketing perspective..... Thanks again.

Is this amp stable down at 1ohm?

 

[keep_hope_alive Premium Member]

Wow!!! That is pretty awesome! I missed the 400-500 "RMS" comment!!!! Are these amps commonly referred to as underrated because they were rated at 12volts (typically) instead of around 14v? Seems like they would want to rate it for would it could put out from a marketing perspective..... Thanks again.
Is this amp stable down at 1ohm?

not stable to 1 ohm. you need a single 4 ohm sub to run off the amp.

 

[slowfive0 10+ year member]

I'm confused a bit--------please explain the following:

"150 watts RMS x 2 channels"---ok this makes sense.

"500 x 1 channel at 4 ohms"---Is that 500watts rms or peak?????

"240 watts x 2 channels at 2 ohm---So close to 500 watts x 2 channels at 2 ohms.....is this 500watts rms? If so that must make the previous statement "500 x 1 channel at 4 ohms" mean "peak" and not rms????

Sorry but confused. Thanks again.

11.9V - 100 W RMS x 2, 400 x 1 at 4 ohm, 200 W RMS x 2 at 2 ohm

14.4V - 150 W RMS x 2, 500 x 1 at 4 ohm, 240 W RMS x 2 at 2 ohm

 

[perfectcircle 10+ year member]

sub needs to be dual 2 or single 4 ohm. underated because they put out more power then rated. when using a single sub bridged on both channels, make sure the final ohm load on the amp is 4 ohm.

 

[perfectcircle 10+ year member]

those are rms ratings. will put out around 500 bridged on both channels.