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View Full Version : Bunch of questions about Amp output/wiring


gerald
07-05-2006, 11:39 PM
Latley, ive been going back and forth between my room and car and have noticed A LOT of changes in the sound quality, but mostly bass response. I have a Pioneer tsw300( i think) 12" sub in a 1.8cube vented box. Which sounds amazing at only 100~ watts. The question i have is, how can i measure how many watts its being pushed at? I have a multimeter but i cant seem to figure out how to calculate RMS wattage. Same goes for the sub in the grand am.

Which leads me to my next question. While listening to a song in my room, then going to the car and hearing the same song. the bass response is just...crap. Its bridged at 4 ohms, but the booklet that gave the specs said 300 at 2 ohms. Nominal power for the sub is reccomended to be at 250. My guess is its at 150 watts at 4 ohms. My question is, how can i measure the power? Should i wire it at 2 ohms? how would i wire it at 2 ohms? IF i wire it at 2 ohms should i wire each VC to a seperate channel(two channnel amp)? or should i just say "Eff it" and go sealed?

RisingX2004
07-05-2006, 11:47 PM
Do you have 4 or 2 ohm coils?

Cant remember about the formula you have to use to figure out wattage though

gerald
07-06-2006, 12:07 AM
dual 2 ohm

RisingX2004
07-06-2006, 02:00 PM
There isnt a way to wire a dual 2 ohm sub to 2 ohms, only 4 or 1 so you are kinda screwed there. The best way i can think to do it would be to wire each coil to a seperate channel and get a Y-splitter and hook up your left channel RCA to both the right and left inputs on your amp. You wouldnt have stereo on the sub though, only the bass in the left channel, which unless you listen to a lot of stuff with a lot of stereo imaging, really wont matter. Whats the wattage in your amp at 2 ohms/channel stereo?

gerald
07-07-2006, 01:05 PM
150RMS per channel, 400 peak per channel. Sub RMS is 150.

BTW sealed box today. 1.5 cubes internal EXACTALLY with sub displacment.

RisingX2004
07-11-2006, 11:59 AM
Hows it sound? Howd you hook it up?

gerald
07-12-2006, 12:30 AM
box is, well...a box. no sub in it yet because my friend who has a jigsaw cant work on the box with me until friday. so until then im still with the vented box.

RisingX2004
07-13-2006, 01:46 PM
oh, I see