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Old 6th June 2006, 09:58 AM   #1
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Default Can this be for real?!

I was just going through some old files and clutter on my harddrive,and ran across this schematic for a 31KW Mosfet amp...

Is this thing for real?
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Old 6th June 2006, 10:15 AM   #2
kartino is online now kartino  Indonesia
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Well, I did not check detailed ho amps works but the 'crude' wattage of amps are depend on how high your rails and how high your speaker impedance. Just simple ohm law V=I.R and P=V.I.

Because you don't mention your output impedance we don't know thw wattage, how many pairs mosfet needed and how many amps to feed the gates, basically whole amps
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Old 6th June 2006, 12:43 PM   #3
sreten is offline sreten  United Kingdom
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simple answer is not really, there are far better ways of approaching
such power levels, e.g. multiple rail class G amplifers.

Though it seems it has +/- 180V rails and is bridged.

IMO there is totally not enough juice to drive
the gate capacitances of the output mosfets.

also see :

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Old 6th June 2006, 12:49 PM   #4
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Hahahahahahaha That is what i call a real heater.

I wonder who would want that extreme powers

As far as i know there is only a driver that takes max 5kW, the MTX JackHammer.
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Old 6th June 2006, 01:06 PM   #5
Jennice is offline Jennice  Denmark
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Did someone say hearing loss?

Just the size and weight of the power supply alone is a scary thought. The idle power consumption must be of "Nelson Pass"'ish proportions

I get paid to break stuff. My g/f gets paid to play with children. Life is good.
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Old 6th June 2006, 03:13 PM   #6
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It's grossly overdone. For a 180V supply, let's say the peak output voltage = 170V which is about 120V RMS. Double it for a bridge gives you 240V RMS in 8 ohms is about 7.2 kW. Puny.

Jan Didden
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Old 6th June 2006, 03:16 PM   #7
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I thought that the really high power stuff was all active crossover with switching amps for the bass/mid and the hf no problem as piezo horns are so efficient.
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Old 6th June 2006, 04:32 PM   #8
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well.. i recently did maintenance on a 100kW switchingmode amplifier 8-) (Solidstate with MosFets)
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Old 6th June 2006, 04:51 PM   #9
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100kW class d !?!?!? Your kidding
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Old 6th June 2006, 05:01 PM   #10
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nope.. imagine such an amp in your livingroom (it takes about that much place..) driving you 98dB hornspeakers... 8-)
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