I've owned a number of Klipsch speakers and have replaced crossovers and drivers as well as added Dynamat around the horns. I don't think it necessarily increased their value, or that I got what I put into the mods back in terms of resale value, and based on some of the responses I received when I tried to sell them, I do think it added to their appeal. And I got to enjoy the results of the mods while I had them.
For me, if the owner makes mods to the electronics, that's a turn-off. If they have the manufacturer or a qualified service shop do it, then it's less of an issue, but may still be a turn-off. Is it really an "upgrade" or a change from what the designer intended?
I recently bought some Herron amps that had been refreshed by Keith. That definitely made them more appealing.
For me, if the owner makes mods to the electronics, that's a turn-off. If they have the manufacturer or a qualified service shop do it, then it's less of an issue, but may still be a turn-off. Is it really an "upgrade" or a change from what the designer intended?
I recently bought some Herron amps that had been refreshed by Keith. That definitely made them more appealing.