Which Amps r good?

[kodakmoment]

Dude Get them LVL 3 .. They Rock .. OR you can get them Ascendant Audio Subs ..

[Ndnkobra]

o that makes sense so do i hook the dmm straight to the amp output?

to your - and + speaker outputs, where you would normally put the speaker wire for your subs. Unhook your subs and set your DMM to Alternating current or it will be marked as ACV on your dmm. What you'll want to do is get a 50hz tone test disc, put in your head unit, make sure your equalizers like bass, treble, etc are all 0. Make sure the bass booster on your amp is off. Turn your volume on your HU to about 3/4 and set your gain all the way down to its minimum, then play your 50 hz tone test, put it on repeat if you can, and set your voltage according to however many watts you are looking for.

So an example would be: a 2000 watt amp, you only want 1200 watts for whatever reason, maybe thats the rms of your speaker. Always use the lower of the two if you're comparing one amp to one sub. If it were 2 subs of the same 1200 watt rms, you'd be okay to use the rms of your amp instead. But back to the point, if you want 1200 watts of power, you'd multiply your RMS by the final impedance load of your system, and take the square root of that, and that will give you the voltage you need to set your gain to. Ex. sqrt(1200W*1ohm) = 34.6V. You would then set your gain to 34.6V, or lower if you'd like to get a good clean signal. Remember to have your 50hz test tone playing, and your dmm is set to ACV. There's also a table stickied somewhere around these forums that gives you all the Watts to Voltage with different impedances if you dont want to do the math

Edited January 7, 2010 by Ndnkobra