System Design/Install Help

[sstevens805]

Ok people I need some help. My little bro doesnt want his system anymore and is giving me an insane deal. So this is what I'm getting from him:
-2 x JL Audio 12w1v2 subs in box
-1 x JL Audio 250/1 monoblock sub amp
-and wires
I'm buying a headunit from someone Clarion 935vd. I know very little about audio/video.

First question, does this amp have enough power to push the subs, it did in his truck and it sounded good, but i dont if the numbers match up.

Can i use the stock speakers too still?

What else should i add to make it sound good?

Any other suggestions?

[JamminWagon]

The speakers are rated at 150wrms max X2 300 watts, amp at 250wrms @1.5 ohms. Hmm thats pretty shady, 1.5ohms rating. trying to make the amps better than they are. Figured out that it is about 187.5wrms at 2 ohms.

1.5 - 250
3.0 - 125
6.0 - 62.5
62.5X3(to get it to 2 ohms) = 187.5

X2 for the so called 500/1 that would be 375wrms @ 2 ohms.

Hmmm JL has just dropped a notch in my recomendation list. They might as well go to "MAX" readings like the walmart "5000wrms" specials. Plus the spec rating 250wX1 @ 1.5-4 ohms. Heck it be 250wX1 @ 1.5 - 4000 ohms too, by their standards.

And then @ 11-14.5vdc Everybody else in the world uses 12.2 & 14.4vdc. So if you have everything at optimum, 1.5 ohm load @ 14.5vdc you would get the 250 wrms. Now for what you are using 2.0ohm(less power) and car regulated to 13.7(less power) = 187.5 / 14.5 = 12.93 w/vdc 12.93X13.7vdc = 177.141 @ 2 ohm @ 13.7vdc. Far from the 250w that one would think they were getting as a casual purchase.

The 500/1 would be a better match. 354wrms at real world rating would let you run the volume up to 85% max volume to get to the 300w max of the 2 speakers paralled.

[Magnum-RT-AWD]

food for thought----RIPS tech. from JL makes its power at any ohm load.


PS---wattage specs rarely mean jack squat----what size enclosure is being used and what type?

[SmoovC]

While numbers are all good, what really matters is how do you like it. While the JL amp you indicated is not a 1000 watt current sucking monster, it should do just fine for your application, it sounds to me. Plus you said you got a deal on it, right?!

The enclosure for the subs is critical for getting good response. JL has different enclosures for different types of sound. (ie: sealed for clean & tight, ported for lower response, etc.)

I would say install it, listen for a week or so & fine tune it. Once the amp is in, it is a very simple task to swap it for a different one, assuming they (or you) use big enough power & ground cables.

While you can use your stock speakers off the Clarion, I would recommend upgrading these components; but again, listen, and you will at that point know what you want & need more of.

Good luck & enjoy, that's what it is all about!!

[sstevens805]

Ok, I just did some more research. Initially my bro told me they're 12's and there was another amp, and we deduced that it was stolen by employees at our company. I have looked further on the internet and found out that they're 10's! So, now i think that the amp has enough power. but to make certain, i'll take pics of everything and post it here.