Nope, never used one, nor heard one. Stumbled upon their site while searching for an RCA audio switchbox. I ended up getting the Niles AXP-1, which although inexpensive, sounds very transparent. BTW, I also have ML's (Aerius i's), vertically bi-amped using a Sunfire Cinema Grand Five. Sounds fantastic. I use the Niles to alternate inputs between my Squeezebox/Benchmark DAC-1 or Yamaha RXV-1000 (for movies).
