I picked up a pair of Monitor 5s (assembly date is1987) from a thrift store yesterday. One cabinet and grill was in good condition, the second appeared to have been dropped, two corners had major damage. Additionally, on the damaged speaker, the clips holding the grill on were missing and the grill was attached to the cab with sheetrock screws; finally, there is a hole, about 1/2 inch in diameter drilled throught the back of the damaged speaker cabinet, looks like it was used as a mounting point. I was able to inspect the drivers on the better unit before buying, they were all shiny, clean, and intact. I took a chance and invested $20.
When I got home, I removed the grill from the damaged cabinet and the drivers looked good, just like the better unit. None of the screwing or drilling did any permanent damage.
I tested the pair with my Hafler P-3000. The better unit sounds good (actually fantastic). The damaged unit had some souind problems. I removed all three components and the cross-over and inspected. No apparent damage. Replaced the components, reconnected, and tested again; tried both speaker circuits and switched the Polks, right and left. Again the better unit is fine, in the damaged unit, the tweeter works but the woofer is silent. Later today, I'll swap the cross-overs to eliminate those as the problem. But, googling around, I read that dropping a Polk often damages the driver.
Couple of questions, I really like the sound of the one speaker and would like to own the pair (main speakers are Bose 901-series 1). But the damaged cabinet will require repair and both cabs need re-veneering, I can do all of that. But, assuming the woofer is shot, can it be repaired, or must it be replaced? How much am I looking at? How much would these speakers be worth?
Appreciate any help.