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Old 22nd September 2005, 11:31 AM   #1
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Default power amplifier

Hello there,

Im not too expert in dealing with high power audio systems.

Can I please to someone who can help me find a greater than 500W power amplifier schematic that can load up to 2 ohms or 1 ohm?

Thanks......... GOD BLESS.....






john.
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Old 22nd September 2005, 12:17 PM   #2
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I wouldn't consider something like this as a first project as you are pretty much guaranteed to end up with something that won't work and costs you a lot of broken parts. Get some experience with a lower power, simpler amp first
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Old 22nd September 2005, 12:58 PM   #3
edl is offline edl  Hungary
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Dear Jcatiwalaan!

If you given a schematic by us, what wuold you do with that?
If you were have enough knowledge and experience to bulid a such big amplifier, in your mind would be a lot of schematics,
including really high power amplifier's schematics! Or not in your mind, but on your desk.

Best Reagards,
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Old 23rd September 2005, 03:57 PM   #4
AndrewT is offline AndrewT  Scotland
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Hi J,
did you mean 500w into 1ohm or 500w into 2ohm or something really big and dangerous 500w into 8ohm?
You could get 500w into 1ohm using +-50v supply rails but would need a lot of capacitance and lots of heavy duty output transistors = high cost.
If you want 500w into 8ohm you will need +-120v supply rails, even bigger cost and you are liable to kill yourself at the same time as you blow up the amp when that test probe slips - OOPS !!
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Old 23rd January 2006, 02:42 PM   #5
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Default power amp project

hello everyone;
Thanks for evryones concern. I am now having my power amp which is from Rod Elliot design (ESP projects) the 300 W subwoofer amp. And it sounds good with my 4 unit of 300 Watts speaker.
Did anyone saw this circuit? what can u see about this circuit? can it be upgraded into a higher power version? how?
Thanks!!!
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Old 23rd January 2006, 03:02 PM   #6
lineup is offline lineup  Sweden
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Default Re: power amp project

Quote:
Originally posted by jcatiwalaan
hello everyone;
Thanks for evryones concern. I am now having my power amp which is from Rod Elliot design (ESP projects) the 300 W subwoofer amp. And it sounds good with my 4 unit of 300 Watts speaker.
Did anyone saw this circuit? what can u see about this circuit? can it be upgraded into a higher power version? how?
Thanks!!!
300 watts seems very low.
Maybe you can build a special version of ESP amp.
Parallel or bridge may give you a more normal 1000 Watts for your subwoofers.

Best of course to use a pair of 2000 Watts amps for very low frequency subwoofers.

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Old 23rd January 2006, 03:16 PM   #7
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Default Now your talking my kind of lauguage

J,
Just for the record, power is a tricky thing. 500watts of anything is enough to do real dammage if your not careful.

I used to repair 80k watt amplifiers used in electrodynamic vibration.

Some were tube and some were solid state.

The tube amps ran about 10kv plate voltage up to about 8 or 9 amps.

The solid state ran a split supply of +/- 100 volts with a K amp on tap.

Then again our 'speakers' ran about .03 ohm and had a magnetic field of about 375 amps. All of this was water cooled gear.
They also came in at about ten tons of total metal.

Look up the Ling 8016 amplifier and the D300 shaker.

BTW the frequency response was about 2 hz to 2khz.

Please rethink the project and start small. An error might not be survivable.

Later dude
Jack Crow in Kuwait
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Old 26th January 2006, 06:27 AM   #8
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Default 300 watts seems very low.

upline,

Where can i get that special version of ESP?

How can i parallel my Amp or how to bridge it?

Does it affect the load?

Co'z I like to have a design of a bigger power of Amplifiers...

Thanks.......
God Bless.........
More power to all of you...........
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Old 26th January 2006, 06:46 AM   #9
lineup is offline lineup  Sweden
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I was only joking.
100 Watt amplifier will make a subwoofer sound loud!

Check out this topic.
Another guy who wants much power:

450W@8 Ohms Mosfet amp schematics needed

I have put a link to a 1000 Watt amplifier schematic.
But I would not recommend this ......
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Old 26th January 2006, 07:24 AM   #10
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Default 450@8ohms

line,

How much is the AC voltage to have -90/+90V rails?

Do 15 Ampere of E-type transformer can achieve that power?

Can i load 2 ohms in this amplifier?

Thanks.......
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