A friend purchased the PHT; the Purple Haze and Blue Velvet and I was amazed at the sound improvement they made. Each was different sounding even though the same size and weight. I am not sure what Ted Denny is doing but these work. My friend has a very revealing VAC system with King Sound King electrostatic speakers and the improvement is amazing. I tried them on my smaller turntable and since I couldn't put the PHT on the actual cartridge head I didn't hear as much improvement.
Synergistic Research PHT - Phono Transducer
Anyone tried these little things on their cartridge? If so, what was the result?