I am thinking of getting 2 infinity perfect 12's and a rockford bd1000 amp.do any of you know a better combination for the same price? I am more into sound quality than SPL. Is the amp good for the subs.Any suggestions?

 

someone let me know what you know about infinity

 

kk939:
I can tell you that if you're looking for SPL you'd be better going with the JL's, but for soundQ Infinity Perfect 12's are phenomenal...esp. for the price. My brother's first setup included two of them. However, they're rated a good bit higher in power than splitting a 1000bd over them, especially with the impedance...if I were you, considering the RMS is 350 but peak is 1400, and considering it is 4 ohms...I would almost suggest that you get two RF 600a2 Power series...or maybe two 800a2 Power series. One for each sub...I'm not a particular fan of the beta digitals that RF puts out...

Austin519

 

Thanks a lot, How much power do you think I should put into each one to get the best out of it?

 

kk939:
Okay...the RMS value (root mean square value) is 350W RMS...a power value. P(RMS) = P(MAX)/sqrrt(2). So, take your 350W RMS, mutiply by the square root of 2...and that gives you 500 or so. Now realize that you'll be running your amp at .75*Max Output...so take that value, P(MAX) and divide by .75. This will give you a good number to shoot for in an amp...here would be 660 watts. Going over this is perfectly fine, and an Infinity can be comfortably run up to about 1000 watts...but don't go below ~660 Watts...so two 600W amps, or two 800W amps would be nice. Also realize that these babies run at 4 ohms...and for instance a RF 1200W amp is 1200x2 @ 2 ohms...so you'd only be giving it 300W per channel at 4 ohms. A RF 600a2 is 150x2 @ 4 ohms or 600x1 bridged @ 4 ohms. Similarly...a RF 800a2 is 200x2 @ 4 ohms or 800x1 bridged @ 4 ohms. I would say a 600 watt amp to each would do nicely and not be too bad on your budget, or your car power system. Or a 1200bd...but do what I always do if you have questions...call Infinity, or if you were looking at RF amps...go call RF...guy I know up there is Jason...their # is 1 800 669 9899.

Realize that going above two 600W a/b class amps...which draw a max of 70A each...which running at 75% is 100A, is VERY close to the 120A that a stock TL alternator puts out...the CLG69 Denso Type. Don't worry because you won't be drawing 100A unless you have the volume up at max, but if you get bigger amps, be prepared for a battery upgrade, and possibly rewinding your alternator for higher output (like I'm doing for mine).

Austin519

 

kk939:
Oh and you won't have to worry about amperages with the class D amps, they have a higher power efficiency...

Austin519

 

sorry I was out of the country for about a month,you kind of confused me a litle bit.Will a rockford bd1500 amp be good for the two subs or should I get two amps for the two subs.

 

One amp should be good of that power...but I always prefer two versus one (symmetry)...

Austin519

 

Thanks a lot men.