posted
I have a punch 500 2 12 inch jbl gt's and 2 12 inch jbl powers in a large 4 chamber box behind my seats in my truck. I hit 137.6 at circuit city with the two gt's and a sansui home 12 inch woofer in a really bad box. Does anyone have an idea of what my spl is going to hit now? It sounds a lot louder now. Oh yeah I've also dynomatted the roof to get it to stop rattling. Will a cap help also?
posted
You need to pick a pair of woofers. Just use either the Powers or the Gt series (preferrably the powers) and sell or put the other two in another vehicle. You will run into problems in output by running two different types of woofers. The modeling characteristics and response of the woofers could actually cause your SPL to decrease. Your amp power and sound quality would be much better with 4 woofers exactly the same in exactly the same boxes. If you wish to compete, I would suggest either sticking with just two, or selling two and getting two more to match. Crutchfield was having a big sale on JBL woofers. With 4 like-kind woofers, and the 500.2 @ 1 ohm mono you should hit high 140's, low 150's. With your current setup, I would guess low 140's. You should get more than 137 out of the 500.2 and 2 jbl 12's, imo. By the way, port the box if you haven't.
------------------ Shedluv No matter what it says, I'll always be just a junior.
"Eagles may soar, but weasels don't get sucked into jet engines."
posted
Thanks a lot im going to sell the gts and get two more power 12s I think they are only 79 a piece in crutchfield by the way they are 5 ohm subs how do I run them 1 ohm mono? And what about a cap? anyone? will it increase the bass output at all?
posted
Wire all of them in parallel. All the '-' together and all of the '+' together. Use that for competitions. For regular daily use, you might try a series-parallel (seee jl tutorial for more at jlaudio.com) combination to make that amp more happy. If you lights are dimming and/or your voltage gauge goes way down when the bass hits, a cap might help. Another battery is almost as cheap as a cap, and it can help a lot.
------------------ Shedluv No matter what it says, I'll always be just a junior.
"Eagles may soar, but weasels don't get sucked into jet engines."
posted
I added two more 12's and did 153.7. I was sittin in the truck with no earplugs either. damn that was loud. Im looking at 10 12's buy next summer and another punch 500.
Printer-friendly view of this topic