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Old 10th April 2006, 09:03 AM   #1
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Default What makes a Power amp suitable?

Hey

what makes a power amp suitable for running a passive subwoofer?

Because I plan on buying the Biema Q series power amp that can bridge 1200 watts rms into 8 ohms

Im hoping just high power, because I feel its a bit of the bandwidth that matters because this amp does 1200 watts @10hz - 50Khz +/- 1.5 Db and cutting of the amp 80 hz is 625 times less than the bandwidth

Thanks
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Old 10th April 2006, 04:02 PM   #2
sreten is offline sreten  United Kingdom
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Hi,

it is pretty much just power that is the only consideration.

/sreten.
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Old 11th April 2006, 12:17 AM   #3
jcx is offline jcx  United States
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Behringer europower 1500 may be cheaper
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Old 11th April 2006, 02:22 AM   #4
Leolabs is offline Leolabs  Malaysia
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Any good driving capability amp will do the job.
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Old 11th April 2006, 04:32 AM   #5
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The sub is for no pacific purpose in general just for both music and home theater,

The cut offs are: (hopfully)

High pass 18hz 2nd order

Low pass 80hz 4th order

I want enough extension and low group delays in a moderate sized box...if I get low extension and low group delay it will be AWESOME for both music and home theatre, but for the price im going to pay it will defintly be good enough
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Old 11th April 2006, 02:03 PM   #6
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I've got a similiar question. What kind of DIY design that suitable to drive 2000W/8ohm subwoofer (Skanning)? I just feel that making classAB is not wise.

Should it ONLY classD that suits this Skanning?
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Old 11th April 2006, 02:23 PM   #7
mzzj is offline mzzj  Finland
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Quote:
Originally posted by lumanauw
I've got a similiar question. What kind of DIY design that suitable to drive 2000W/8ohm subwoofer (Skanning)? I just feel that making classAB is not wise.

Should it ONLY classD that suits this Skanning?
I would go for triple-darlington output stage, dozen or two MJL-series transistors, possibly two channels bridged.

And something like this for heatsink...

Click the image to open in full size.

Class-D is lot more difficult to design, especially at these power levels. Class-AB design is pretty much same no matter if it is 200W or 2000W design, but with Class-D you have completely new set of problems when you step up the power.
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