High Efficiency Amps

[Hammy 10+ year member]

Can anyone tell me some nice high efficiency amps that are under 500 dollars and will put out 1000+ watts RMS. I mean like 85% efficient. Right now I'm running a jbl 1200.1 and it's not doing that bad on the stock alt @ 2 ohms, but I'm going to a RE XXX 15" soon, bringing down the ohm load and uping the amps. Rather than go to a new alt I figure a new amp would be in order, preferrably something with a subsonic filter too. All help is appreciated.

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[paikiah 5,000+ posts]

Originally posted by Hammy Can anyone tell me some nice high efficiency amps that are under 500 dollars and will put out 1000+ watts RMS. I mean like 85% efficient. Right now I'm running a jbl 1200.1 and it's not doing that bad on the stock alt @ 2 ohms, but I'm going to a RE XXX 15" soon, bringing down the ohm load and uping the amps. Rather than go to a new alt I figure a new amp would be in order, preferrably something with a subsonic filter too. All help is appreciated.

1000+watts RMS at what ohm?

I'm also assuming that you want a class D.

 

[denim 5,000+ posts]

for high power and high efficency D-class is the way to go

 

[Hammy 10+ year member]

Yea class D and @ 1 or 2 ohms, the XXX wires to 1.2 ohms. The JBL is something like 70% efficient, and I'm just looking for an amp that has less amp pull for every watt put out.

 

[paikiah 5,000+ posts]

Originally posted by Hammy Yea class D and @ 1 or 2 ohms, the XXX wires to 1.2 ohms. The JBL is something like 70% efficient, and I'm just looking for an amp that has less amp pull for every watt put out.

hmm, how about JL subs? TO me, they seem very costly, but I'd trust Jl to do a good job... or you could go for more expensive alternatives...

 

[n2audio 5,000+ posts]

Originally posted by paikiah hmm, how about JL subs? TO me, they seem very costly, but I'd trust Jl to do a good job... or you could go for more expensive alternatives...

Did you mean JL amps? They're recognized as some of the less efficient class D's available.

The best spec I've seen for efficiency was the Lightning Audio -- 80% at 1/3 power, but it was for a 600watt amp.

DEI was pretty good at 73%

RF was 76 for the 1000.1 and 77 for the 500.1

Crossfire - about 74

But to be perfectly honest -- if you're playing a test tone - at 1000 watts it's going to take some current whether it's 90A or 100A. But if you're playing music which has a duty cycle of 10-20%, rms demand will be more like 15-20A.

 

[paikiah 5,000+ posts]

Originally posted by n2audio Did you mean JL amps? They're recognized as some of the less efficient class D's available.

Really? No shit? Hmmm.... how about Brax then?

 

[n2audio 5,000+ posts]

Don't have any info on brax.

 

[audiolife 5,000+ posts]

i dont know of any amplifier that would or could be 85-90% eff at that high of output level. class d's are friendlier that way but higher you get on the power capability of the amp the less eff it gets. if you did a waterfall type graph with power v effby the time you got to the high side of it it would look like an a/b amp but before that mess it does have an eff advantage

 

[denim 5,000+ posts]

Originally posted by n2audio Don't have any info on brax.

BRAX

 

[Woodmister 10+ year member]

US Acoustics USX1000D Subwoofer Mono Amp

I had the 600D (400Watts) and it drew NO POWER and was loud as heck! The USX1000D is a D class and puts out 1250Watts!

PLACE TO BUY

http://www.thezeb.com/caraudio/us_acoustics.html

REVIEWS

http://www.usacoustics.com/audio.html

http://www.sounddomain.com/shop/reviews/list.pl?reviewed_sku=USAUSX1000D

http://www.carreview.com/pscCar,Audio/Amplifiers/US,Acoustics,USX-1000D,Amplifier/PRD_130087_1806crx.aspx

 

[Woodmister 10+ year member]

Also has a subsonic filter and a remote bass control

 

[DB4Me 10+ year member]

these amps are actually very nice and they are rated at 12.9 volts rather than 14.4 so its true power, if you are running at 2 ohms your car will handle it (obviously not all cars) with some dimming, 1 ohm you are really stretchin it, the lanzar vibe 1200d has efficiency of over 80

 

[denim 5,000+ posts]

US Acoustics are very very good amps

 

[n2audio 5,000+ posts]

Originally posted by DB4Me the lanzar vibe 1200d has efficiency of over 80

Carsound tested it at 67% @ 1/3 volume.