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Old 1st March 2011, 10:53 AM   #1
xsmid4 is offline xsmid4  Czech Republic
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Default Customworks A400 mosfet amplifier

I would like to draw attention to this amp, it was really good. Input stage contains J-FETs, error correction, 5 pairs of lateral mosfets Renesas. Quiescent current of 500mA and 2x400W / 4, see the Measurements.

http://www.customworks.cz/amplifiers/

even the price it quite low, considering the material used. Cooling of 500mA will need big heatsinks, its about 70W per channel, they prepare the box, but till now only amplifier modules are available. Maybe next months. I will watch this.
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Old 1st March 2011, 03:10 PM   #2
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Click the image to open in full size.PhotoClick the image to open in full size.

Last edited by hcrevize; 1st March 2011 at 03:25 PM.
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Old 1st March 2011, 03:14 PM   #3
Page.P is offline Page.P  Czech Republic
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Thanks xsmid4.

Here are some measurements with better resolution:
1kHz 10W load 4Ohm
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1kHz 100W load 4Ohm
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10kHz 10W load 4Ohm
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13+14kHz 100W load 4Ohm
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THD 72W 4Ohm
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What do you think?
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Old 1st March 2011, 03:25 PM   #4
PMA is offline PMA  Europe
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How about schematics? Many members might be interested in it. You do not need to show component values.

Regards,
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Pavel Macura
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Old 1st March 2011, 04:47 PM   #5
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THD HYPA A400:
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Old 2nd March 2011, 04:24 PM   #6
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4ohm 10kHz 1V/d:Click the image to open in full size.

4 ohm 100kHz 1V/d:Click the image to open in full size.
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