JBL Amps - Opinions?

[Jon11582]

Thanks for suggestions. I think I'm just going to put it all together, and if I feel I need a capacitor/new battery later, I'll install them later. I do have a headunit with sub outputs, so I dont need to tap to my speakers.

kubi, i like the analogy - From what I understand, the capacitor "stores" energy so when the subs demand more for a hard hit, it has the extra power to give it, instead of straining the rest of the electrical system that controls the headlights and such. While its not hittin, the alternator puts out a little more power to restore the energy level of the capacitor, so its good for the next hit.

If you constantly exceed the limits of your alternator, or have too many hard hits for the alternator to keep up with, no number of capacitors will help. Theyll make it last a little longer, but eventually your headlights will start dimming again. Its just a buffer.

I'm tellin' ya guys, I'm learning alot here.

With 600w of subs, I may dim with a full on hit, but I think my electrical probably can give out about 300-400w extra as it is, so I may not need one. Its just a rough estimate, so I guess the best way to tell is to actually experiment and install the system in and see if the extra capacitance is needed.

I think its about time to start hunting down that BP600.1...

[MGLax13]

You prob wont need one unless you're pushing hte subs at 600W all the time. Thats alot of bass, so I think you'll be ok.

[Jon11582]

Thats along the lines of what I was thinking, thanks MG.

Heres another piece of my puzzle...Ive been reading that the JBL amps dont come with a built in subsonic filter. I hear it can damage some subs without its presence.

It seems that this cuts out frequency ranges under 20Hz, which is inaudiable sound, but is that necessary for the system I'm trying to build? If I do need one, where can I find one? If I dont need one, why not, and why is there all this talk about it when I see reviews and stuff?

[prophesized]

thats true, jbl amps dont come with a built in subsonic. if you are putting your subs in a sealed box this doesnt matter. the only time you would need one is in a ported box and even then it isnt absolutley necessary if you listen responsibly and/or dont listen to music that has low bass notes.

if you want one, probably the best route to take would be to get a phoenix gold basscube.

[AzN_DrAgoN48]

i have a jbl 600.1 amp and i have dvcs. how do i wire it? if i wire it like a svcs it will give it a 1 ohm load, which is unstable.

shold i do it like these?


or


are these even correct?

[Mole]

what a coinky dink... i just picked up a pair of those subs.

on sale @ fry's... 2 for 150+ tax.

[Jon11582]

Man I need a frys around here.

We got bestbuy but thier lame in the car audio department. Acutally I cant think of any store around here that isnt.

[HKSV6SLE]

hey mike are those subs any good? and i say if the subs can take the ohms at a low load safely run it down to 1 ohm. mine are wired to 1 ohm now and bumping great.

[OKANG.]

hey mike are those subs any good? and i say if the subs can take the ohms at a low load safely run it down to 1 ohm. mine are wired to 1 ohm now and bumping great.

I'm guessing you meant to say "if the AMPS can take the ohms at a low load", right? The subs don't care about their own level of resistance, but the amps sure as heck do. Just about every amp is stable down to 2 ohms stereo or 4 ohms bridged. Decent amps are good down to 2 ohms bridged and competition-type amps can go as low as 1/2 ohm. Just remember, the lower the resistance, the harder you'll be pushing the amp and the hotter it will run.

[Jon11582]

I heard people got the JBL down to 1ohm without a problem, but its not officially supported.

Thats 4 4ohm subs, two DVC 4 ohm subs, or two 2 ohm subs. wired in paralell. You dont really get much more gain at 1ohm for most amps Ive seen, and your just putting extra stress on it, so if your building a system from scratch, it seems like 2 ohm is the target to hit for mainstream amps. I dont know much about competition level amps, but they may get much more power out of a 1 ohm load.

BTW, I still havent built my system, but I do feel alot more confident about it from when I started.

[Mole]

hey mike are those subs any good? and i say if the subs can take the ohms at a low load safely run it down to 1 ohm. mine are wired to 1 ohm now and bumping great.

dont know, im still breaking them in.

[AzN_DrAgoN48]

this is a stupid question but is it possible to replace the red light under the jbl to blue? the light scheme in my car is blue and the red light kinda throws it off.

[OKANG.]

I don't see why not. I bet you'd just have to change a couple of LED's. You might want to check the voltage of the current LED's first so you can buy blue one's with the same specs.

[ChrYstiE]

i have two 1200.1's and two p180.2's. they're the sh*t. that is all. and the lights on the amps are orange.