A great thread for Klf-20 owners..have had mine for 16 years. Have got crites titanium tweeter installed, and crossover caps. Internal Bracing done as per moray James' recommendations. All these have raised the quality of sound. Now looking to order the titanium mid drivers. I have always used decware's 2-watt set amp with the klfs. I find as I get older, I like listening at lower volumes but still want a big soundstage so hoping the titanium minds will aid the cause.