RMS on subs, how is it mutli. Options

[JFrost9]

Ok, so im still shopping for subs, and i assume ive figured everything out, the good brands the bad brands, the way they are measured and all the other stuff. Im still confused on one thing though. If i was to buy lets say an ALPINE SWR-1222D 12" DVC 2 Ohm 1500W SUBWOOFER. Its around 500 RMS. Heres my question... if i was to buy not 1, but 2 instead, how would that change the RMS and everything else? i thought it would just mean that i would have 1000 RMS, but that doesnt seem to be the case. Ive been searchin around to try and figure out how it works, but i figured it would be easier to ask.

[ShadowFX]

if you get 2 subs, therefore effectively doubling the power, you should gain about 3dB, given the best conditions. its not really noticeable. i have two subs mainly because I got them for a great deal, and for show factor. for daily listening, im sure you'll be hard pressed to tell the difference between one or two subs, especially at the low frequencies.

This post has been edited by ShadowFX: Sep 14, 2005 - 8:40 AM