Mixing up sub sizes

Just wondering..I asked this in another forum but they kinda bs'd their way around the ?..What would 2 12's and 1 15 sound like in a car/truck?..or maybe 2 10's, 2 8's and 2 12's..or..you get the idea. would you be catching a more definate sound spectrum rather than making a leap from 6 1/2s to a 15?

The only way to get that to work properly is to use bandpass crossovers on the subs. So lets say your 15 plays from 20hz to 50hz and then the 2 12's pick up at 50 and got to 100. The speakers will cause cancellation amongst each other. The will play but if you want something that sounds good just stick with one size driver.

The only way to get that to work properly is to use bandpass crossovers on the subs. So lets say your 15 plays from 20hz to 50hz and then the 2 12's pick up at 50 and got to 100. The speakers will cause cancellation amongst each other. The will play but if you want something that sounds good just stick with one size driver.


ditto, and don't just stick with only one size, but one type also (don't put in a 12" type-r and a 12" type-s for example)

another problem is just simple sizing output. As a rule (within the same brand and type especially), 2 8's = 1 10, 2 10's = 1 12, etc ... so you would need appx 4 10's to make 1 15 - and a LOT more power. The best system turns out, as stated in an earlier post, to be say 15's or 18's as Subs and 8's or 10's as midbass drivers - each playing a different frequency range. As a rule, you should never have more than one speaker per channel playing the same frequency range - except of course subs.