My mix of pro and high end stuff. The amp is a Crown pro-touring amp Class-I which is the technology the new Mark Levinson Reference amp, the Nº53 is based on. Parasound P3 pre-amp, and a Behringer passive EQ, set flat. The digital front end is a Marantz DV-7600 with their HDAM output stages. Note the tweeks i learned from Stereophile!