The speakers and panels are all 20 years old. Has anyone had panels last longer than that and still sound good without audyssey? Wondering if it makes sense to buy new panels for $3k or more if the rest of the speaker might need work. Got a feeling the woofers are probably going out too since they don't produce much bass now. How about the electronics? Guess there is at least a crossover too? Seems like it could be similar to buying an old home that turns into a money pit.