System setup question box rise

[darron016 10+ year member]

So my buddy hooked up an spl lab, and clamped my amp..

I have an INFINITY REFERENCE 1211A amp.. 1300 RMS @2 ohms only 2 ohm stable

I have dual 2 Sa 12's, wired to 2 ohms.

I got a 140db and after calculations, im only getting about 230rms per sub, these subs are rated at 600.. Will i blow them since I guess im underpowering them? Also how can I hit a 140 if im only seeing 450 combined RMS.

Im thinking about getting a bb2400 witch is 2400@1 ohm..

Can I use a one ohm amp, even if I wire the subs to half ohm?

Also why is my box rise at 7 ohms, but subs wired to 2 ohms?

Click to read more...

 

[darron016 10+ year member]

Bump.. Does anyone here know car audio?

 

[Boomsday 10+ year member]

So my buddy hooked up an spl lab, and clamped my amp..I have an INFINITY REFERENCE 1211A amp.. 1300 RMS @2 ohms only 2 ohm stable

I have dual 2 Sa 12's, wired to 2 ohms.

I got a 140db and after calculations, im only getting about 230rms per sub, these subs are rated at 600.. Will i blow them since I guess im underpowering them? Also how can I hit a 140 if im only seeing 450 combined RMS.

Im thinking about getting a bb2400 witch is 2400@1 ohm..

Can I use a one ohm amp, even if I wire the subs to half ohm?

Also why is my box rise at 7 ohms, but subs wired to 2 ohms?

No

Wattage does not determind how loud a setup will be

Yes, but be since you know very little I wouldnt do this

Box rise is a B!t ch, try out different things to get it down, like less speaker wire, or you may have to build a new box to get it down..

 

[darron016 10+ year member]

Im arguing with people in facebook, they said box rise is highest at the peak frequency.. Witch is where I got the 7ohm box rise, they say at my peak I see less RMS to my subs. But why would it be louder with less RMS? (200)rms but on the other frequencies where box rise is at like 4 or 5 I get more RMS.. but its not as loud.