350 watt amplifier for sub-woofer

[Phile75]

Hello,

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
Phile75

 

[sigiux88]

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]

How much do you want to spend?

That is always the first question.

 

[sigiux88]

http://www.elektronika.lt/schemos/garso/20kw/350wmos.gif
Here is that amplifier circuit

 

[djQUAN]

is that for the car or home?

 

[goobz]

that schematic is for anthony holtons symmetrical mosfet amp. you can get the full article at his website http://www.aussieamplifiers.com/ 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]

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]

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]

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

 

[djQUAN]

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.

 

[xplod1236]

You can always make an amp out of LM3886 chips. If you bridge them with +/- 35v supplies, they will give you 450 watts max into 8 ohms. You can get free samples from www.national.com