I bought a new pair when they were released back in the day. Had to sell them when I moved into my college dorm room. Wish I hadn’t.
Besides checking the crossover caps, I recommend replacing the woofers. Their surrounds are likely rotten. I bought another pair of DQ-10’s from an eBay seller about 15 years ago and inserted them into a system with a 200WPC amp powering them. The woofers gave way in the first 10 min of moderate levels of music, with detachment of the cones from the surrounds and driver frames.
Besides checking the crossover caps, I recommend replacing the woofers. Their surrounds are likely rotten. I bought another pair of DQ-10’s from an eBay seller about 15 years ago and inserted them into a system with a 200WPC amp powering them. The woofers gave way in the first 10 min of moderate levels of music, with detachment of the cones from the surrounds and driver frames.