80v DC amplifier kit

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#4
2000 watts ??? 2500 watts ??? man this thing will be a smouldering pile of slag long before it gets 1/2 way there.
It has a super optimistic 10 amp fuse on the main power input. I would bet its barely capable of 1000 watts, assuming 80% efficiency, barely 1000 ... Rayma's numbers are probably accurate in the best case scenario.
But I will look @ those IRS2092's and see what they can do.
Thanks.
Srinath.
 
#5
Overly optimistic specs aside, they still fit your criteria for supply voltage. 😉

I have a Tripath TA0105A reference board that's been sitting for around 8 years unusued. Some day I'll put it one of these AudioSource AMP7T chassis I have, since all of their TA0104 modules fried.
 
#6
wattage and cost

theAnonymous1 said:
Overly optimistic specs aside, they still fit your criteria for supply voltage. 😉

I have a Tripath TA0105A reference board that's been sitting for around 8 years unusued. Some day I'll put it one of these AudioSource AMP7T chassis I have, since all of their TA0104 modules fried.
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The 2000 watt one is $299. I am going to use it like to 1/4th of its potential.
Why are the other lower wattage IRS2092's operating off lower supply voltage.
Thanks.
Srinath.
 
#8
srinath said:
Why are the other lower wattage IRS2092's operating off lower supply voltage.
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Because a lower voltage means a lower output power for a given load.

srinath said:
How about this one -
2X 250W Class D Audio Amplifier Board Amplifier IC IRS2092 Sure AA AB32291 | eBay

I'll ask them for confirrmation if it will work @ 80v. Also when the amp is under no load it is 80v, what would happen if we draw 500 watts from it ? it would drop right ?
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Your power supply will sag some under load; how much it sags depends on the power supply. The biggest problem is that since +/-80V is the MAX supply voltage of the board, bus pumping could cause the over-voltage protection to trip.

Are you trying to work around a power supply you already have? Is it transformer based or switch-mode?
 
#10
I have a dead SAE A205, with 50v and 80v switchable Toroidal trafo. The corresponding outputs are 100 watt and 200 watt.
I can run it @ 50v permanently, but that would mean it would barely break 200w output, besides I have several dead amps with around 50v EI core trafo I can use.
I am still trying to repair it, I cant find an issue in it, nothing burnt nothing looks off, and its making no sound except for a tiny tiny crr in 1 channel as I am turning it off.
Its got 20 mv DC in 1 channel, and essentially 0 in the other. Something in the signal path is dead, but how can it happen in both channels, and they dont share nothing in the signal path, no crosstalk, I even suspected the RCA jacks, but I have varying AC voltage @ the input.
I'll look into some of those kits as well, I am very much hoping to fix the amp without grafting another kit amp in it.
Thanks.
Srinath.
 
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