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Old 16th August 2005, 10:32 AM   #1
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Exclamation request high power amplifier

hi
I am milad . I am come from iran . I am not good english language .
I am farsi language . I am Collegian electronic in iran , I want
a 400 or 500 or 600 or 1000 Watt R.M.S high power audio amplifier stereo
for project university . I does search on the forums and find circuit
PA-600 but there was write : might be an error or two in the drawing or parts
list ??? I want build a circuit high power audio amplifier 400 - 1000 Watt R.M.s
stereo for project university please help . ( please a working circuit and
not error ) I need to your help.

babye
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Old 16th August 2005, 10:48 AM   #2
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Default Re: request high power amplifier

Quote:
Originally posted by mohandes_milad
hi
I am milad . I am come from iran . I am not good english language .
I am farsi language . I am Collegian electronic in iran , I want
a 400 or 500 or 600 or 1000 Watt R.M.S high power audio amplifier stereo
for project university . I does search on the forums and find circuit
PA-600 but there was write : might be an error or two in the drawing or parts
list ??? I want build a circuit high power audio amplifier 400 - 1000 Watt R.M.s
stereo for project university please help . ( please a working circuit and
not error ) I need to your help.

babye

Hi Milad,

Welcome to the forum !

Well, the power range you are looking for your project is pretty high. As far as I am concerned, projects in this forum have, mostly, a lower power range. I can't recommend one project for you either but if this is your first amplifier project I would suggest going lower on power requirements. You can find a lot of nice designs around here ranging from really low values up to 200 W.

Managing high power levels requires some experience.

Sorry for not helping much.

Joćo Pedro
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Old 16th August 2005, 10:55 AM   #3
Luke is offline Luke  New Zealand
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this might help you.

N-Channel mosfet amplifier schematic needed
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Old 16th August 2005, 02:57 PM   #4
AndrewT is offline AndrewT  Scotland
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Hi,
when you reach a power output of 400wrms into an 8ohm load you need power supply rails of about +-100Vdc. At this level this becomes a dangerous project. For 1000Wrms into 8ohms it is even more dangerous.
Take great care if you decide to go this high power route for your first project.
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Old 17th August 2005, 10:28 AM   #5
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How about the Leach Super Amp; a mature, reliable design with excellent notes on the designer's website http://users.ece.gatech.edu/~mleach/superamp/

also said to sound very good.
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Old 17th August 2005, 10:43 AM   #6
Eva is offline Eva  Spain
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400W at 8 ohms already is quite an ambitious project since supply rails at idle would be approx +-95V and standard output devices would be used at the limit of their SOA.

Bridging, class G and class H are two alternatives in order to get higher output powers in a practical way. Note that class G and class H circuits are somewhat more complex than conventional ones, so developing such an amplifier from scratch may take several months and hundreds of dollars in components.
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Old 17th August 2005, 04:57 PM   #7
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The ZEETA is a high power amp
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Old 18th August 2005, 04:59 AM   #8
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Quote:
Originally posted by rajeev luthra
The ZEETA is a high power amp

Oh , Rajeev, its ZETA not ZEETA, its quite sure that its an high power design...

Quote:
Originally posted by EVA 400W at 8 ohms already is quite an ambitious project since supply rails at idle would be approx +-95V and standard output devices would be used at the limit of their SOA.
Why not use Large SOA 250V Mosfets such as IRFP264 and get rid of these Bipolars 5200/1943

regards,
K a n w a r
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Old 18th August 2005, 12:35 PM   #9
quasi is offline quasi  Australia
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Default What's the amp for?

If the amp is for PA work then this cct would be suitable. I have built the amp shown as a party system. It runs on +/- 90 volt rails and it delivers just over 650 watts into 4 ohms using 10 IXFH26N50's per channel (5 per rail).

With 4 extra FETS per rail, and some small cct modifications 1000 watts into 4 ohms is acheivable.

The power supply as suggested already will be ambitious and will look like;

1. At least a 3KVA transformer with 2 x 80 volt (under load) AC windings. This will give you DC rails of about +/- 110 volts.

2. At least 100,000 uF of capacitors per rail per amp module.

3. 50 amp bridge rectification per amp module.

4. A lot of other heavy duty stuff.

Plus a budget of over $1,000US if you purchased everything new.

If you build it, please post your results.

PS. Of course you could always build a Class D .....might be cheaper.

Cheers
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Old 18th August 2005, 02:50 PM   #10
Leolabs is offline Leolabs  Malaysia
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the circuit is simpler than i thought Nice design.
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