I am the original owner of a pair of TW1's and also own two pair of 1A's and a pair of 3's. I bought a pair of 1A's to replace my beat-up pair of 1's, and then upgraded to a pair of 3's. My problem is that after about 15 minutes of playing, I noticed a very low and/or no woofer output from one and then both speakers! In the meantime, I went back to listening to my 1A's. One night I put in a disc I got from a friend (A Perfect Circle "Thirteenth Step"), and put it in to play. Having never heard or played it, I had no idea of the bass content, and seconds into the first track, I blew a woofer in each speaker! I had owned my 1's for over 30 years without a problem, and never blew any speaker in my life (I use quality electronics; my first amp/preamp, which I bought when I bought my original 1's, was an Apt 1 and Holman preamp; I later upgraded to Denon POA-4400's and, later, also a pair of 6600's). I finally found a place to have my 3's looked at. They both had bad electronic protection devices which were cutting power to the woofers. It was $15 for the parts and $150 for labor. I got them back and hooked them up last night. Both speakers play fine, but, one losses bass output (woofer electronic protection mode) around 100 watts and the other will play until the cows come home. I have to keep the output lower than I like and can't utilize the potential I am seeking. Still, The biggest difference I have noticed is that much improved low bass response. Also, all of my TW'S have all of their original parts. I have read that the caps should be replaced. The tech said they were fine, but, the speakers are over 30 years old. Also, I had read to replace the caps with polyprops, but the tech told me they are about $30 each. I also saw your reference to ERSE. I could probably replace the caps myself if they aren't too hard to replace, but I would rather have an experienced tech do it. I also want the speakers to play at their best. Besides the caps, what would you recommend I replace? Which caps with what? What about upgrading the drivers to polypropylene (aren't the drivers paper cone?)? so want the speakers to play at their best. Besides the caps, what would you recommend I replace? Which caps with what? What about upgrading the drivers to polypropylene (aren't the drivers paper cone?)?