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2000 rms @ 4ohms

Old 11-11-2006, 09:06 PM
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2000 rms @ 4ohms

I am buying an Orion H2 10" DVC 2 ohm sub from a member on the site. I wouldn't mind running it at 4 ohms just because it's less strain on my electrical system and lower distortion. (this is correct?)

Anyways does anybody know where a person can get a decent priced high power 4 ohm sub amp? Seems to get pretty expensive running subs at 4ohms.

I can definitely get a good priced amp at 1 ohm. Does anybody think it's not worth the effort and price to run at 4ohms compared to 1 ohm?

And why do some cheaper amps seem to draw so much more power from your electrical system compared to a higher end amp?

This setup will be strictly for daily street use, ported box. Thanks.
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Old 11-11-2006, 09:34 PM
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Originally Posted by 347strokin
And why do some cheaper amps seem to draw so much more power from your electrical system compared to a higher end amp?
it's all about Efficiency... they are less efficient.

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Old 11-11-2006, 11:07 PM
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What would happen if I ran two of these amps to this sub?
I've got one Kenwood KAC-9152D already. Here's the specs:

Mono channel Power Amplifier with Dual Mono Drive Function
RMS Power: 500W x 1 @ 4 ohms
RMS Power: 900W x 1 @ 2 ohms
RMS Power: 900W x 1 at 1 ohms
RMS Power: 900W x 2 at 4 ohms (Dual Mono Drive)
Detachable Aluminium Dress Plate & Top Panel Control
Dual Mono Drive (Bridged Connections of KAC-9152D x 2)


Again the sub is DVC 2 ohm 2000rms/2500peak watts.

So if I bought another one of these amps and ran each one to each voice coil, each amp would be seeing 2 ohms. The amps should run fine with this load, right? Each amp would be running 900 rms @ 2 ohms. And this amp is made to run with another identical amp to one sub as stated by Kenwood.

Thanks for the help, I'm just trying to get my head wrapped around a decent way to power this thing without dropping down to 1 ohm impedance.

Last edited by 347strokin; 11-11-2006 at 11:09 PM.
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Old 11-11-2006, 11:54 PM
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According to the stats you just posted if you do strap the amps they each need to see a 4ohm load so running a 2ohm voice coil to each amp wouldn't be a good idea. Unless you can find stats finding otherwise (I am not that familar with that amp)

RMS Power: 900W x 2 at 4 ohms (Dual Mono Drive)

However now that I think about it each amp can individually run at 2ohms, it doesn't make much sense that each needs a 4ohm load....

Guess I'm not much help, sorry....

Last edited by StickyFingaz; 11-11-2006 at 11:56 PM.
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Old 11-12-2006, 06:26 AM
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That's exactly what Im thinking, these amps should be able to push that at 2 ohms.
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Old 11-12-2006, 07:52 AM
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That rating (900w x 2 @ 4 ohm) is confusing. To me, it seems to be mentioning the total impedence load seen on both amps. That seems to be the only way it makes sense. Is it trying to make note that the amp is simply strappable? Personally, I don't see why the 2ohm load of each coil would present an issue to the strapped amplifiers. An email to Kenwood may be in order...
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Old 11-12-2006, 08:23 AM
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chances are, you will be hard pressed to find a 2KW amp that does full power @ 4 ohms. One that comes to midn however is the US Amps 2000X. and a few other US Amps in there line up.

Running amps @ 4 ohms and 1 Ohm should not make a difference. THD may rise (and this is a maybe) but it will definately be in audible especially if you are only play sub frequencies IE: 80 hz and down.

Remember it takes power to make power. ANY true 2KW amp will take quite a bit of power to make its rated power.

Lastly, you do not need 2000 RMS for a single H2 10. save your money and get something between 600-1000 RMS H2's are more than happy with this amount of power. If your just using it for street use, look into a high effiency class D. they can be found relatively cheap. look in the for sale forums. 1000 @ 1 ohm.
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Old 11-12-2006, 09:45 AM
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Originally Posted by battyrida
save your money and get something between 600-1000 RMS H2's are more than happy with this amount of power.
I don't agree with this at all. I wouldn't run any less than 1000rms to one and the audible difference between 1000rms and 2000rms on one is quite dramatic. The H2 needs a good deal of power to peform the way it was intended.

347strokin - Any difference in distortion between runnning a decent amp at 1ohm compared to a decent amp at 4ohm will not register to your ears. Not even close.

With your second reason being efficiency you would be best looking for a Class D amp and not worrying about efficiency between different loads.

Look for a decent quality class D amp that does 1500-2000rms and you'll be set. There's plenty of them to choose from.
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Old 11-12-2006, 10:55 AM
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You should give Lanzar's OPTI2000D a bit of consideration for this application. They are not overly expensive and put out alot of power. I would know because I have one...Mine is wired at 1 ohm and puts out 1600 watts RMS... if you want, you can even run it to half ohm...Check out Lanzar Car Audio
I dont know of many Lanzar dealers in Canada however, member crabmustang is one...If youre interested, PM him and see what he has to say about this amp...
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Old 11-12-2006, 04:33 PM
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Originally Posted by Hardwrkr
I don't agree with this at all. I wouldn't run any less than 1000rms to one and the audible difference between 1000rms and 2000rms on one is quite dramatic. The H2 needs a good deal of power to peform the way it was intended.
I agree. Any less than 1000 and you will be disatisfied. I powered my first h2 with 1300wrms and it was loud. But I did a rough measure of how far the cone was moving out and it was only about half of the max excursion of the sub. So if you can get 2k watts to one of these I bet it would be crazy.
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