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Phile75 26th June 2004 09:30 AM

350 watt amplifier for sub-woofer

I am looking for a design of an amplifier to drive a 350 watt sub-woofer.
Design targets:
- good 20 Hz wave
- Minimum 350 Watts at 8ohms
- No filters, it will be driven by an electronic crossover
- can be a less powerful amplifier (e.g. 100 watts) but must be able to be bridged (i.e. 2 amplifiers to give 350 watts)
- Will drive a single driver unit (350 watts at 8 omhs)

Thanks & Regards

sigiux88 30th June 2004 09:51 AM

2 Attachment(s)
Try to use this amplifier. Its not cheap, but quality is great! Only 0,008% bad sound at 200W. Also you have to use minimum 10 000uF for suply. 10Hz-100kHz

Paradise_Ice 30th June 2004 10:41 AM

How much do you want to spend?

That is always the first question.

sigiux88 30th June 2004 06:47 PM
Here is that amplifier circuit

djQUAN 6th July 2004 11:47 AM

is that for the car or home?

goobz 6th July 2004 02:49 PM

that schematic is for anthony holtons symmetrical mosfet amp. you can get the full article at his website its in the power amplifiers section.
djQuan - if you're asking if the amp could be used in the car/home then yes as long as you had an appropriate power supply.

maxw 6th July 2004 03:31 PM


Originally posted by djQUAN
is that for the car or home?
Either. The difference between a car amp and a home amp is generally just the Power Supply part of the circuit.

Ie, a car amp PSU has to get +/- V from 12VDC.
A home amp PSU has to get +/- V from 110/220VAC:)

Phile75 6th July 2004 04:20 PM

Hello People,

thanks a lot for your replies, they're appreciated.

I am checking the design links I received. However here is some input:

- Power supply no problem. I have components to build a very large one. I have some 15.000 uF capacitors left from my previous hand made QUAD 405.
- How much to spend: well, I was hoping to get away with some 250 to 400 USD excluding power supply.

Best regards

Upupa Epops 6th July 2004 04:40 PM

To sigiux88 : I don't see there any protection against shorting :xeye: - do you think, that is it 100 % safety ?

djQUAN 7th July 2004 02:52 AM

short circuit protection may not be needed if you're careful enough. I had my P3A's for more than a year now and I still haven't blown a fuse. taking into consideration it has been to several parties along with another amp as a loud disco PA system.

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