Daniel Queen Controlled Arrival speakers were demonstrated for me c. '81 at an audio retailer in central NJ which later became Melos Audio. Associated equipment was a JVC TT w/Grace F9E cart, Bruce Moore Audio Design Uranus 3 preamp & Audire Forte stereo or PSE mono amps. The two cylindrical speakers were set close to each other in the center of the room. We listened to several albums I brought--classical & rock. Sound was by far the most 3 dimensional I ever heard. Dark Side of the Moon was a hallucinatory trip. It filled the room. The treble was too dry & I didn't have $2500 to blow on a pair of speakers so that was that. Imagine replacement parts for the product of a long gone small business presents challenges. One of these years I should check out contemporary omni-directional speakers.
Thanks for jogging a 40+ year old pleasant memory. IIRC caveats apply.
Enjoy in good health,