Need amplifier advice

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=54293
Printed Date: May 08, 2024 at 6:13 AM

Topic: Need amplifier advice

Posted By: jdog0411
Subject: Need amplifier advice
Date Posted: April 20, 2005 at 2:30 PM

I own a 2003 Ford Explorer with a Pioneer deh-7600mp head unit, Infinity Kappa 5 x 7's in all four doors, and I'm going to be installing an Infinity Perfect 12.1d sub in a sealed 1.0 cubic foot box in the rear.

Right now, I am powering the Kappa's with the head unit, so they are probably only seeing 20 watts RMS. They are rated at 100 watts RMS and I want to get an amp to power them at that, and and amp to power the sub which is rated at 350 watts RMS but can easily handle more. I would probably be looking at around 500 watts for the sub. My question is, should I try to find a single amplifier to power the speakers and the sub (and do they make 100x4 and 500x1 5 channel amps) or should I get separate amps for each?

And, which amplifiers would be best for the job? I am not looking to spend a fortune, but want qualilty amps in the medium-end range. Thanks in advance.

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Replies:

Posted By: jdog0411
Date Posted: April 20, 2005 at 2:50 PM

One more thing, what is the consensus on Phoenix Gold amplifiers? Yea or Nay?

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: racer427
Date Posted: April 20, 2005 at 3:02 PM

If you are looking to save space, then definatly go for the single amp. As for PHG, I have never really heard anything bad about their products. Not sure as to what you are looking for in an amp but, I have personally heard the 700.5 from kicker and it rocked. But, really, it would be best if you could experience it for yourself.

Chris

-------------
Alpine CDA-9833 HU
Diamond Audio M661 Components
MTX Thunder T6.6 Components:rear fill:
Cadence Q400 4 Channel Mains + rears
Thunder 801D Subs
MTX 1004 10's
Dual 4g wire to rear
4g grounds

Posted By: jdog0411
Date Posted: April 20, 2005 at 3:10 PM

Thanks for the suggestion, space isn't really a concern, I plan on just putting the amps under the rear seats so they will be out of the way regardless. I have been looking, and it seems I will be hard pressed to find a single amp that puts out 100 watts x 4 channels plus at least 400 watts rms to a sub channel. I will probably go with two amps. I'm basically looking for an amp that will cleanly power the subs and satellite speakers. I want to be able to get it loud but retain sound quality. I'm concerned with SQ over SPL. I want to rock but don't need to be heard from two blocks down the street.

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: jdog0411
Date Posted: April 20, 2005 at 3:17 PM

I was thinking that anotehr option may be to just get a 2 channel amp to power the front speakers, let the head unit power the rears for fill, and then get another amp for the sub. That way, I could get a five channel amp and just bridge the channels to get more power to the fronts and the sub. I would still like amp suggestions...thanks.

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: racer427
Date Posted: April 20, 2005 at 5:10 PM

Well, the kicker KX700.5 puts out 85x4 and 420 to the sub channel. Thats not enough?

-------------
Alpine CDA-9833 HU
Diamond Audio M661 Components
MTX Thunder T6.6 Components:rear fill:
Cadence Q400 4 Channel Mains + rears
Thunder 801D Subs
MTX 1004 10's
Dual 4g wire to rear
4g grounds

Posted By: jdog0411
Date Posted: April 20, 2005 at 5:21 PM

According to Cardomain.com, the specs on the KX700.5 is 70 X 4 and 210 to the sub at 4 ohms. So I would be looking for more sub power than that. My kappa's are rated at 4 ohms and the sub can be run at either 2 or 4 ohms. The specs don't say anything about running that amp into a 2 ohm load.

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: racer427
Date Posted: April 20, 2005 at 5:24 PM

I got the specs for the amp right from kickers website.

https://www.kicker.com/05/05kicker.html

Posted By: jdog0411
Date Posted: April 20, 2005 at 5:26 PM

I see the specs your talking about now....that is at 2 ohms. Can I run that amp into 4 ohms for the satellites and 2 ohms for the sub? Or does the load have to be equal across all channels?

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: racer427
Date Posted: April 20, 2005 at 5:28 PM

The sub portion of the amp is seperate from the rest of it. You can run your mains at 4ohms and your sub at 2ohms.

Chris

Posted By: racer427
Date Posted: April 20, 2005 at 5:29 PM

The sub portion of the amp is seperate from the rest of it. You can run your mains at 4ohms and your sub at 2ohms.

Chris

Posted By: jdog0411
Date Posted: April 20, 2005 at 5:32 PM

Ok, good......that may just be the amp I'm looking for then. Thanks for the recommendation!

-------------
2004 BMW 325ci.
Alpine CDA-9885
JL 300/4 and 250/1
JL XR 5.25 comps
Infinity Kappa Perfect 12

Posted By: racer427
Date Posted: April 20, 2005 at 5:35 PM

Not a problem, if you have a local Kicker dealer close to you, I would go check it out first, just to make sure that it is the right amp for your application and I know that it is a pretty big amp as well.

Chris