JBL Amps - Opinions?

[Jon11582]

I think I've decided on a what subs to get. I'm trying to work out a deal with someone on a pair of Infinity Reference 1220W in a box (300w RMS, 1200W peak each).

Ive also decided to get a 4 guage amp wiring kit from knukonceptz.

Last part is the amp, and I was originally looking at USAcoustics, but I hear that new USAcoustics amps arent as high qual anymore since they shifted production. Since I dont know which are the ones that were made before they shifted over, I started looking at JBL and they look like they suit my needs without breaking my budget.

I was specifically looking at the BP600.1 and the BP1200.1 mono amps. I'm still not sure which one would be better for these subs (suggestions?). I was wondering what you guys though of JBL amps. I dont really want to spend more than about 250 on the amp, so I was wondering if there was anything better in this price range for these subs. (I can pick up the BP1200.1 for about 250 on Ebay, I havent checked elsewhere yet).

Also, besides the subs,box, wiring kit, and amp, is there anything else I need before I begin the install?

Thanks in advance for any suggestions. This is my first sub install and I'll take all the advice you guys can offer get to make sure it goes smoothly.

[geminimouse]

You want to use a mono amp on two subs?
If ur lookin for somethin cheap maybe a profile california ca1200 2channel amp.

[MGLax13]

I'm a big big fan of JBL amps. They run cool and are reasonably priced.

[HKSV6SLE]

they should be ok.....you should check out the jbl/crown amp....7000 watts max...haha

[prophesized]

You want to use a mono amp on two subs?

thats what mono amps are for

what impedance are your subs? i think the 1200 might be too much power for them

[Jon11582]

They are 4 ohms each. The JBL BP600.1 is 300W at 4ohms 600W at 2ohms and the BP1200.1 doubles those numbers. (they are stable down to 1ohm, but I read around that its gets really hot and distorted at 1ohm.

From what my research tells me, if I wire them in parallel, itll pump through 2ohms, so I get 600w with the BP600.1 and 1200w with the BP1200.1. Is that correct? Now is that 1200w for the whole entire circuit, or 1200w total, giving 600w each to the subs?

I got a D in physics back in highschool and again in college so I probably have no idea what im talkin about. I'll probably end up getting the 600.1 since I think I'll be really stretching my electrical with 1200w of extra output

[MGLax13]

You have 2 4ohm subs. With the JBL amp, there will be 4 holes for speaker wire. 2 for each sub ( + and a -). If you connect one sub to one set of holes, and another sub to another set of holes, it will automatically be like wiring them in parallel. JBL did this as a feature. If you do this, then in the BP600.1, you will be giving 300W to each sub. In the BP1200.1, you will be giving 600W to each sub. I think you should go with the BP600.1. That should be enough power.

[prophesized]

You have 2 4ohm subs. With the JBL amp, there will be 4 holes for speaker wire. 2 for each sub. If you connect one sub to one set of holes, and another sub to another set of holes, it will automatically be like wiring them in parallel. JBL did this as a feature. If you do this, then in the BP600.1, you will be giving 300W to each sub. In the BP1200.1, you will be giving 600W to each sub. I think you should go with the BP600.1. That should be enough power.

except it will give the amp a 1 ohm load and jbl says its only stable to 2. i know the bp1200 can take a 1 ohm load fine but i dont know if the 600 can.

[MGLax13]

No, it will give it a 2 ohm load like I said before. The Infinity Reference subs, model 1220W, are SVC (single voice coil) and have a 4ohm per coil impedence. It is impossible to wire 2 4ohm SVC subs into a 1ohm load. You can only wire them into a 2 ohm (in parallel) or an 8 ohm (in series) load.

[Jon11582]

If you do this, then in the BP600.1, you will be giving 300W to each sub. In the BP1200.1, you will be giving 600W to each sub. I think you should go with the BP600.1. That should be enough power.

Thats exactly what I needed to hear. Thanks. I had downloaded the manuals for the BP600.1 so I did see the extra ports to hook up in parallel, and I was planning to use that.

One last thing. Is there anything else I will need besides the amp, subs, the box, and the amp wiring kit? Thanks for all the help so far...I think I'm confident enough now to start on buying parts for the project.

BTW I'm pretty sure the BP600.1 is 1 ohm stable, but its inefficient at that low of an impedance and still produces about 600w, the same as it would have produced at 2ohms.

[indiglosolara]

If you do this, then in the BP600.1, you will be giving 300W to each sub. In the BP1200.1, you will be giving 600W to each sub. I think you should go with the BP600.1. That should be enough power.

Thats exactly what I needed to hear. Thanks. I had downloaded the manuals for the BP600.1 so I did see the extra ports to hook up in parallel, and I was planning to use that.

One last thing. Is there anything else I will need besides the amp, subs, the box, and the amp wiring kit? Thanks for all the help so far...I think I'm confident enough now to start on buying parts for the project.

BTW I'm pretty sure the BP600.1 is 1 ohm stable, but its inefficient at that low of an impedance and still produces about 600w, the same as it would have produced at 2ohms.

a capacitor would help.. it will help from keeping your headligts from dimming when the bass hits..

[MGLax13]

I agree, a capacitor would be nice. If you're using the factory HU, you'll need a line converter or you're gonna have to use the speaker level inputs, so you might need some extra speaker wire. A crimper\stripper is a good idea. If your amp kit didn't come with it, you'll need 2 ring terminals (power and ground) and a butt connector or a crimp cap for the turn on lead.

[prophesized]

my mistake i thought they were dual 4

[HKSV6SLE]

oh but someone on the boards thinks that caps are "useless" i wont say who or my posts will "disappear" again. i have two caps and they keep my light from dimmming.

[kubi]

They're not useless, they just don't have as much use as people think they do. Although they solve headlight dimming consider the reason they solve headlight dimming. It's like going over the limit on a credit card. Although the transaction is accepted it doesn't mean you have the balance available on the card to make the purchase. You get charged a fee, and the fee is a higher load on your alternator. Just because your alternator couldn't put out enough power for your system and all your electrics (headlights) doesn't mean a cap will help it do that.