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Old 1st July 2010, 07:05 PM   #101
joka22 is offline joka22  United Kingdom
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here you go
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Old 4th July 2010, 10:43 AM   #102
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(65v)/2 / 4r = 528.125w
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Old 4th July 2010, 12:06 PM   #103
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So you have a regulated supply, and an amplifier circuit that can swing rail-to-rail with zero loss?
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Old 4th July 2010, 01:02 PM   #104
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my point is, what do you assume to get from a +-65V supply to the 2xxW at 4Ohm load.

This seems a little too low to me even when you also take output swing and rail "breakdown" into account, and I want to understand how you got to this figure.
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Old 4th July 2010, 02:11 PM   #105
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Quote:
Originally Posted by apexaudio View Post
If you can have PSU without voltage drop with full output power, you can get 120Vpp or 42vRMS output voltage with +/-65V DC rail voltage. That will be 225W/8R or 450W/4R with 1% THD, or 300W/4R with 0,1% THD like CROWN DC300 with 1,5kW transformer. Power is not important, this amplifier give great chance for begginers to made functional amplifier.
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Old 4th July 2010, 02:26 PM   #106
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ah, thanks apex.
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Old 5th July 2010, 04:20 PM   #107
joka22 is offline joka22  United Kingdom
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so anyone interested in swapping?
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Old 31st July 2010, 04:10 AM   #108
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sir apex,

do you have a design of simple amplifier that can be used to drive a sub on 4 ohms load at 2000 watts and dont have a step driver?
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Old 31st July 2010, 10:42 AM   #109
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Without a step it would require 40 of MJ21196 outputs, two of the basic design (bridged, 20 per half amplifier) and running on about 95V. Doubling up on the drivers will also be needed, and most of the smaller transistors (including the drivers) will need to be changed to higher voltage types.

I would consider a stepped supply, six pair of MJ21195/96 on the lower rails would be adequate for 2KW/4R.
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Last edited by djk; 31st July 2010 at 10:48 AM.
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Old 31st July 2010, 02:28 PM   #110
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Originally Posted by djk View Post
Without a step it would require 40 of MJ21196 outputs, two of the basic design (bridged, 20 per half amplifier) and running on about 95V. Doubling up on the drivers will also be needed, and most of the smaller transistors (including the drivers) will need to be changed to higher voltage types.

I would consider a stepped supply, six pair of MJ21195/96 on the lower rails would be adequate for 2KW/4R.
djk

135vdc supply do you have a schematic for 2kw at 4 ohms
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