In the '70's I attended an audio show at a hotel across from Madison Square Garden in NYC, several floors of audio manufacturers showing off their latest and greatest equipment. At the time, I was shopping for a new pair of speakers and had done exhaustive research. I had narrowed down the field to a pair of Polks (I believe it was the 10's). As I wandered from room to room, I kept noticing these speakers I had never seen before, it seemed many of the manufacturers had chosen these speakers to demo their equipment with. A few weeks later I went to my local high end audio store to demo the Polks. After less than a minute, I told the salesman to turn them off, I was crushed! The speakers I was so sure would be heaven sounded terrible...all that time wasted, I was so disappointed and started to leave when I spotted these speakers, the ones I had seen at the show (I had forgotten all about them). I thought to myself, if these speakers were being used by all those manufacturers maybe I should give them a listen...I was back in heaven. They were a lot more money than the Polks but the sound! After several more trips to the store to audition these speakers with my turntable and albums I was completely familiar with, I was sold. I still have my DQ-10s today, they are a mirrored pair, sequential serial #'s. I've had the woofers re-foamed by Regnar, the tweeters have been replaced and the crossovers upgraded with the newer caps and resistors. Originally they were powered by a Phase Linear 500 amp, today the are powered by a Parasound amp, Emotiva sub and Paradigm rear speakers. I'm thinking about upgrading to some mono blocks. After all these years, I am still amazed at the sound coming from these speakers, I will never sell them!