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DigitalJunkie 6th June 2006 09:58 AM

Can this be for real?!
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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? :confused:

kartino 6th June 2006 10:15 AM

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

sreten 6th June 2006 12:43 PM


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 :


Tekko 6th June 2006 12:49 PM

Hahahahahahaha That is what i call a real heater.:att'n: :att'n: :att'n: :att'n: :att'n: :att'n: :att'n: :att'n: :att'n: :att'n: :att'n:

I wonder who would want that extreme powers:bigeyes:

As far as i know there is only a driver that takes max 5kW, the MTX JackHammer.:bigeyes: :bigeyes: :xeye:

Jennice 6th June 2006 01:06 PM

Did someone say hearing loss? :D

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 :cannotbe:


jan.didden 6th June 2006 03:13 PM

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

davidsrsb 6th June 2006 03:16 PM

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.

Mr. Triatic 6th June 2006 04:32 PM

well.. i recently did maintenance on a 100kW switchingmode amplifier 8-) (Solidstate with MosFets)

Tekko 6th June 2006 04:51 PM

100kW class d !?!?!? Your kidding:bigeyes: :bigeyes: :eek:

Mr. Triatic 6th June 2006 05:01 PM

nope.. imagine such an amp in your livingroom (it takes about that much place..) driving you 98dB hornspeakers... 8-)

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