The speakers are rated 89 db at 1 meter and are nominal 4 ohm. The amps compared were my Conrad-Johnson 27A (class A) and Marantz PM10 (class D). For the comparison of dynamics I used C-J ART 88 line stage, C-J ART Phono, HW-40 w/SoundSmith Hyperion, Luxman D-10X using a mix of Redbook and SACD. Dynamics in all cases were determined by the source material. In other words there was no difference due to which amplifier was in the circuit. Both amps were played at both moderate (75-80 db peak) and loud (100-105 db peak) volumes.
