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Meyer sound class AB/H sch?
Meyer sound class AB/H sch?
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Old 25th December 2018, 06:03 PM   #1
rhythmsandy is offline rhythmsandy
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Default Meyer sound class AB/H sch?

Does anyone has schematic of the meyer sound amplifiers? This class AB/H with mosfets seems interesting.
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Old 25th December 2018, 08:27 PM   #2
justanalogue is offline justanalogue  Netherlands
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No schematic's for Meyer Sound, if an amps fails you have to replace the complet module, a little contrary to John Meyer's hippy background, a UPA amp module will sets you back 1200€, despite the fact just one IC was causing the problem..
That amp is based on IRFP9140 and IFRP140.
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Old 26th December 2018, 03:54 AM   #3
rhythmsandy is offline rhythmsandy
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ok

any possibility that you have pics of those?
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Old 11th January 2019, 05:46 PM   #4
justanalogue is offline justanalogue  Netherlands
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UPA 1P main board
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File Type: jpg IMG_5546.jpg (850.3 KB, 81 views)
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Old 11th January 2019, 06:38 PM   #5
rhythmsandy is offline rhythmsandy
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Hi Justanalogue do you have some more pics of overall board and some zoom in on the ICs.

Btw at what voltages are these amplifiers running?
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Old 11th January 2019, 09:16 PM   #6
justanalogue is offline justanalogue  Netherlands
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No, that's all, and I don't work there anymore so this it, all I know is that Meyer uses Meanwell PSU's, SMPS as far as I could judge running on 48 Volts and 15 for the control board.
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Old 17th January 2019, 05:32 PM   #7
rhythmsandy is offline rhythmsandy
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ok but how many IRFP140 mosfets were there for that amplifier per channel.
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Old 19th January 2019, 06:35 PM   #8
justanalogue is offline justanalogue  Netherlands
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No idea, but both parts use the same amount, the woofer is 2 Ohms impedance and the high driver 8 Ohms.
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