I need a sub amp that can do 1500 watts @ 4ohm. - AVS Forum
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post #1 of 21 Old 11-20-2012, 07:44 PM - Thread Starter
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Any suggestions?

Thanks.
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post #2 of 21 Old 11-20-2012, 08:27 PM
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You don't have any from your own research? How about an EPX4000?

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post #3 of 21 Old 11-20-2012, 08:42 PM - Thread Starter
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Yeah the ones I've found were similar to the EPX4000 and while I consider that an option I was just wondering if there were any that were monoblock and more dedicated to home theater and not PA systems.
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post #4 of 21 Old 11-20-2012, 08:50 PM
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An amplifier is an amplifier...so what have you found? Just want a quiet one?

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post #5 of 21 Old 11-20-2012, 08:59 PM - Thread Starter
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post #6 of 21 Old 11-22-2012, 04:54 AM
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post #7 of 21 Old 11-22-2012, 06:48 AM - Thread Starter
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How are those Crown Amps so light for the power they put out?
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post #8 of 21 Old 11-22-2012, 07:45 AM
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I was not aware of this Cerwin Amp. How does it stack up? Comparable to a XPA-2 at all?

Thanks.
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post #9 of 21 Old 11-22-2012, 08:09 AM - Thread Starter
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Well it puts out 1800 watts bridged @ 4 ohm, so I would say its in a little different category than an XPA-2
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post #10 of 21 Old 11-22-2012, 08:16 AM
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Quote:
Originally Posted by TenTonBass View Post

Any suggestions?

.

I like Crown XTI amps for subs, and they have a DSP with a lot of signal processing built in.

With just speaker we're talking bridged, so an XTi 2000 or XTi 2002 would seem to be a good fit.
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post #11 of 21 Old 11-22-2012, 08:19 AM
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Originally Posted by TenTonBass View Post

How are those Crown Amps so light for the power they put out?

New Power Supplies are much lighter. No reason to lug around 70 pounds amps anymore.
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post #12 of 21 Old 11-22-2012, 08:31 AM
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Quote:
Originally Posted by TenTonBass View Post

How are those Crown Amps so light for the power they put out?

Switchmode power supplies. I've had them on the test bench, and frankly the biggest problem is finding an outlet to plug them into that can provide enough continuous power for a bench test. I ended up pulling a 30 amp 230 volt circuit.

The other interesting thing is that several amps from the same series with an at least 2:1 difference in power rating are visibly identical, inside and out. But the test bench says nobody is lying.

This same technology when applied to home gear will have similar benefits - much easier to ship and install.
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post #13 of 21 Old 11-22-2012, 09:11 AM - Thread Starter
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Those Crown XTi amps look very nice!
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post #14 of 21 Old 11-22-2012, 09:15 AM - Thread Starter
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Originally Posted by arnyk View Post

Switchmode power supplies. I've had them on the test bench, and frankly the biggest problem is finding an outlet to plug them into that can provide enough continuous power for a bench test. I ended up pulling a 30 amp 230 volt circuit.
The other interesting thing is that several amps from the same series with an at least 2:1 difference in power rating are visibly identical, inside and out. But the test bench says nobody is lying.
This same technology when applied to home gear will have similar benefits - much easier to ship and install.

So they are major strain on your home electrical system compared to other amps?
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post #15 of 21 Old 11-22-2012, 09:24 AM
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Quote:
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Quote:
Originally Posted by arnyk View Post

Switchmode power supplies. I've had them on the test bench, and frankly the biggest problem is finding an outlet to plug them into that can provide enough continuous power for a bench test. I ended up pulling a 30 amp 230 volt circuit.
The other interesting thing is that several amps from the same series with an at least 2:1 difference in power rating are visibly identical, inside and out. But the test bench says nobody is lying.
This same technology when applied to home gear will have similar benefits - much easier to ship and install.

So they are major strain on your home electrical system compared to other amps?

Not as long as I just use them with music. ;-)

A 2 killowatt power amp has the inherent power to trip out a 120 volt 15 amp circuit. If it can't do it under test bench conditions, then it is lying about what it is.
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post #16 of 21 Old 11-22-2012, 09:32 AM - Thread Starter
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Yeah this is for a DIY subwoofer and mostly to be used for HT and a little bit of music.
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post #17 of 21 Old 11-22-2012, 01:22 PM
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Quote:
Originally Posted by arnyk View Post


Not as long as I just use them with music. ;-)
A 2 killowatt power amp has the inherent power to trip out a 120 volt 15 amp circuit. If it can't do it under test bench conditions, then it is lying about what it is.

Test tones and full sweeps aren't great for speakers either. I had a Crown CE4000 that play fine with only a 15 amp circuit and club music. If you could find a Crown K1 or K2 they would be perfect for HT duties.
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post #18 of 21 Old 11-22-2012, 05:51 PM
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The Cerwin is rated at 400 watts at 8 ohms; 600 watts at 4 ohms; 2 channels driven.

The XPA 300 watts RMS @ 8 ohm (0.1% THD) 500 watts RMS @ 4 ohm (0.1% THD); 2 channels driver.

That's pretty close, but the Cerwin is way cheaper, and I can't even find a decent review of it. Makes you go hmmmm.
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post #19 of 21 Old 11-23-2012, 05:42 PM
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Not certain about your exact power requirement, however I'd check out Yamaha's P series amps, their rock solid and quiet. If you need an audiophile looking piece then Emotiva will fit the bill.

FWIW, .... don't fret the trying to hit an exact wattage number, as halving/doubling is merely 3dB either way.

Also, many enthusiasts have used the Behringer EP4000, and modded the fan with success. I'm not into fan mods, but yeah the EP series is certainly well vetted and inexpensive.

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post #20 of 21 Old 11-23-2012, 05:49 PM
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Quote:
Originally Posted by TenTonBass View Post

So they are major strain on your home electrical system compared to other amps?

Typically less so, watt per watt, because of higher efficiency.

Just because there is a knob doesn't mean you should turn it.
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post #21 of 21 Old 11-23-2012, 05:51 PM
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Quote:
Originally Posted by knc2007 View Post

Test tones and full sweeps aren't great for speakers either. I had a Crown CE4000 that play fine with only a 15 amp circuit and club music. If you could find a Crown K1 or K2 they would be perfect for HT duties.

I think the CE4000 is actually a better sub amp but, yeah, need to do something with the fan noise if listening at lower levels.

Just because there is a knob doesn't mean you should turn it.
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