Whats better, 2 12's or a 15

sedate wrote: Uhh.. dude. The radiating area of the driver (sd) is inherently tied to the diameter of the driver.... i mean.. common sense tells us that. The excursion thing? A 12" with a long excursion will have a larger surround, thus, LESS radiating area, while a 15 with a small excursion will have a smaller surround, thus MORE radiating area.

Oops, I meant to say SD x Xmax. It is quite possible to have a 12in sub with a larger displacement(sd*xmax then a 15in driver. I do agree that a larger excursion will reduce cone area by increasing the size of the surround. Ok then, lets use the numbers that someone provided earlier. 1x15" = 175 sq in 1x12" = 113 sq in, convert that to mm and you get 1x381mm = 113951.385sq mm 1x304.8mm = 72928.8864sq mm So then, at 1mm excursion the 15" displaces more air. Now, if the 12in moves 2mm and the 15in moves 1 mm, then the 12 displaces 145857.7728sq mm, and the 15 displaces 113951.385sq mm So as you can see. It is quite possible for a 12 to displace more air volume then a 15. It all depends on SD and Xmax

uthinkuknoaudio wrote: lol, people trying to tell me about SD. My when I was your age, Denon just came out! Now,i've had 30 years of install/audio experience, and more cars than i can count. I am a professional electrical engineer as well. I dominate with audiophile and SQ knowledge that could make your brain fold in. U think U know audio, you are wrong tcss. last time i checked 30 > ur X years (if they are valid)... JL's truck sucks... They are garbage (W1v2) as well as 1/2 off there other products. I'll never buy a JL product as they are overpriced. Don't say what bug jumped in my ass about them, many years of working with their equipment makes me disfavor it over other better brands for less money. All you need to do is 2x power to take advantage of efficiency is you do it right. By the way, if you don't know what impact is, you are an idiot. Impact is the physical measurement of how much sound you feel from low frequencies (aka how hard your subs hit). No tool, just pure physical measurement. My 3 15"s will hit harder than 1 10 obviously. You can tell when you get in the cars! IMPACT IS NOT EXTREMELY IMPORTANT FOR ALL PEOPLE...just bassheads or SQ people that tend to like bass.... :)

Started when you were 16, huh? Do many 8-track installs? Or were those too "overpriced" for you?

VEHICLE: 2002 GMC Sonoma ZR2

Alpine CDA-7940

AudioControl EQT x2

JL Audio 1000/1

JL Audio 10W6 (originals) x3

Kicker ZR120

Kicker ZR460

Polk GXR-6 x4

Polk GXR-4 x2

Thank you once again Paradigm, remember the Pioneer KP-500? First underdash cassette with bass AND treble controls and Dolby. Made the 8 track go away.

You're welcome Sedate: I hope you didn't take any of my posts personally. I did not mean them to be that way.

Huh? What would I take personnally?"I'm finished!" - Daniel Plainview

8 track was the deal baby! Stupid tape players (except the Nakamichi Dragon!)"I don't play games. I play Nakamichi and that for real yo" - Probably some japanese kid said this in the early 80's trying to sell stereo out of his trunk lol.