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Old 14th February 2008, 07:54 PM   #1
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Default simple class d sub amp

hi
im new to the world of class d amps so forgive my ignorance
i have built a few gain clones and valve amps but now i would like to try building a class d amp for a sub i have built ideally between 200-400 w rms into an 8 ohm load
does anyone have a simple schematic and psu for my project the more basic the better
many thanks
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Old 15th February 2008, 02:56 AM   #2
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try the 41Hz.com amp2 kit....

600W into 8 ohms bridged... Probably around 400W at 0.1% thd.
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Old 15th February 2008, 06:41 AM   #3
luka is offline luka  Slovenia
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Hi

I don't know if you will be able to make one yourself and since kits from 41Hz aren't that expensive.

Amp2 is sure the way to go I have one and I am very happy with it, and you could push it to ~850w into 8 with rails of +/-60v
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Old 21st February 2008, 09:54 PM   #4
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Quote:
Originally posted by luka
Hi

I don't know if you will be able to make one yourself and since kits from 41Hz aren't that expensive.

Amp2 is sure the way to go I have one and I am very happy with it, and you could push it to ~850w into 8 with rails of +/-60v

What's the difference between the amp2 and amp8 kit? I don't have either right now, and if I can run an amp2 with 60v rails it seems pointless going for an amp8....
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Old 21st February 2008, 11:43 PM   #5
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AMP8 has more output FETs for lower impedance loads. If you tried to run a 4R load on the AMP2 with +/-60v rails........
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Old 22nd February 2008, 01:13 AM   #6
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"you could push it to ~850w into 8 with rails of +/-60v"

? I calculate that 60V gives 225 W into 8 ohms.

Maybe you meant 2 ohms?
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Old 22nd February 2008, 03:04 AM   #7
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I think he meant BTL. I was also thinking BTL with my above comment.
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Old 22nd February 2008, 07:29 AM   #8
luka is offline luka  Slovenia
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Hi

Bridge, BTL since you need it for sub, you need only one channel, or in this case BTL
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Old 22nd February 2008, 07:38 AM   #9
luka is offline luka  Slovenia
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Quote:
Originally posted by theAnonymous1
AMP8 has more output FETs for lower impedance loads. If you tried to run a 4R load on the AMP2 with +/-60v rails........
Watch me , it is not a problem, 22A current limit will give you over 900w into 4r, and +/-60v over 800w into 8r, cooling should be good
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Old 22nd February 2008, 02:14 PM   #10
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Quote:
Originally posted by theAnonymous1
AMP8 has more output FETs for lower impedance loads. If you tried to run a 4R load on the AMP2 with +/-60v rails........
Ahh, ok. I haven't built either yet, but the amp8 sounds like it is the one to go for me.
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