Looks like during production the thermal paste dipenser got empty and they didn't care. So over time it cooked the amp module and keep the inside hotter than designed for.
Usually you should find a cause for the resistors burning. The don't do that just for fun. Current through them must have been excessive. Why?
You are lucky to have a working unit, so you can compare measurements!
The "tweeter amp" is an identical "hanger amp" for the powered AS300 mono amplifier. So you add a sole amp module and have a stereo or 2-channel amp. If the hanger amp is defective, try the sole, powered amp module ant check for voltages of the supply, according to the ICE data sheet.
As long as the +- 12 Volt supply for the active x-over are not over voltage, you have a good chance it didn't suffer. So a new AS300 plus an A300 hanger or only the hanger should repair it.
Usually you should find a cause for the resistors burning. The don't do that just for fun. Current through them must have been excessive. Why?
You are lucky to have a working unit, so you can compare measurements!
The "tweeter amp" is an identical "hanger amp" for the powered AS300 mono amplifier. So you add a sole amp module and have a stereo or 2-channel amp. If the hanger amp is defective, try the sole, powered amp module ant check for voltages of the supply, according to the ICE data sheet.
As long as the +- 12 Volt supply for the active x-over are not over voltage, you have a good chance it didn't suffer. So a new AS300 plus an A300 hanger or only the hanger should repair it.
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Thanks, it is indeed weird that the resistors are this charred. They are on the same trace as one of the blown capacitors so there is a possibility that it happened because of that.
PS These are bridge amps, so do not ground any of its speaker wires, as both are life! A common cause for problems, when people try to measure the speaker output or disply it on a scope, producing a short.
