After following Moray James and SET 12's advice on improving the crossover network, improving the cabinet damping, and installing Bob Crites Titanium tweeter diaphragms, and Klipsch K-53 Titanium mid range diaphragms, I wondered can these speakers be further improved. The answer is Yes!. I sent the diaphragms (in the original shipping boxes) and the crossover networks with internal speaker wire to Cryogenics Intenational, Scottsdale, Arizona. The cost is $9.00 a pound with a $75.00 minimum charge. They treat parts on Fridays and return them on Tuesday. The improvement was substantial and well worth the money. Imaging is improved, detail is increased, the sound is less fatiguing, and more musical emotion is felt. I think this is a great upgrade at very little cost.
David Pritchard