Good morning. First time post for a long time Polk fan. I have a matching set of Monitor 10s that I'm running off a Sansui G-8000 receiver, and one of the 10s developed a problem that I'm struggling to fix.
First off, let me say that the speakers as a whole sound incredible. My wife and I love our music, and often like it loud. While the left speaker is constantly trying to peel the paint off the walls with it's amazing bass, the right speaker sounds very flat - only about half the bass, with no bottom end presence to speak of - but an almost annoying amount of high-mid end.
More importantly, at a good and loud level of volume, the right speaker bangs/distorts. It sounds almost as if the rubber surrounds on the drivers are torn and both cones are rubbing against the baskets of each of the drivers... Or if the cone is mounted off-center of the coil. However, BOTH drivers are new as of last year. I replaced the old drivers when I thought that they were the cause of the no bass/distortion issue.
Based on the sound characteristics I'm experiencing, I'm leaning toward the crossover being the issue. With that said, I have the schematic for the Monitor 10, but I'd like to know about the best components to use. I've read that SoniCaps are a good choice, but I'd like some input on the entire rebuild process before I go forward. Should I rebuild the crossover on the left speaker so that both match?
Finally, I spoke to a tech at Polk when this problem first showed up last year. He asked whether or not the Monitor 10's cabinet was air tight. When I replaced the drivers, I didn't use any gasket material on the baskets before I placed them in the cabinets...but there also didn't appear to be any gaskets on the old drivers when I removed them. How critical is it for the cabinet to be air tight as far as reproducing accurate bass?
Thanks for taking the time to respond.