I have a battery with a 90Amp Res. stock alt. and I have ONE Pioneer Premiere sereis sub its 1200Watt Peak 400Rms is is the TS-W1207D2 i have a Kenwood 929 amp with a peak of 100 watts and 350 RMS i have bin told they are a close enoguh match up, but I am asking opinions if i could run this without damaging car ec.

 

i'd check the specs on your amp, i've never seen any car audio product where the rms rating is higher than the peak power. Also, is the subwoofer rated for 4 ohms? And do you know if it is a single or dual voice coil subwoofer?

 

Sorry I meant 1000watt max for my kenwood and my sub is a DUAL 2 Ohm voice coil

 

Dual 2 ohm isnt too common, usually they run dual 4 ohm I believe, and when you series a single sub it goes to 8, and parallel to 2, unless its meant to be run off of a mono block in which then 2 would make 1 and mono's can run 1ohm stable. If the Kenwood is 1000w, then its at 1ohm bridged usually.
So for 2 ohm, take the bridge, and half the wattage. So now you have 500w @ 2ohm, same with 4 ohm, half it, so 250w at 4ohm, 125 at 8, etc, and thats bridged. If its a 2ch, then its 250w x2 @ 2ohm.

Now if its a dual 2 ohm sub, then wired in series it would draw at 4 ohms which would be 250w per channel, if wired in parallel it would be 1 ohm and draw 1000w (500w per coil) which would be spot on, and then you just lower your gain a tad. No matter what, parallel or series, wire it in the bridge if its a single sub. The test reviews on that particular amp say it CAN in theory put out 1000w, but most likely will not. Just remember, use a cap, it'll prolong the life of the amp and the sub by stabilizing the voltages it draws.

Overall, that amp, wired properly, is perfect for that sub. Make sure you're running at least 4g power/4 or 2-0g ground. And at least 12g for the sub itself.

 

will my stock altenator be ok?

 

Should be as long as you have a capacitor, hook it all up, through a cap, and turn your lights on, and turn the music up, if your headlights still dim then you still need more.

 

caps are no good. not worth the money. do it right and do the big 3 upgrade