Impossible to say. Unless it is a full proper rebuild, which might cost $200+, then it's all going to be crutches of a sort (good crutches, bad crutches)....and the lifespan of the amp will be what the clock says when it finally fails.
This is the nature of audio electronics. Like life, it's a series of blind and open trade-offs.
This is the nature of audio electronics. Like life, it's a series of blind and open trade-offs.