RM9

About the RM9

The Music Reference RM-9 is a high-output vintage tube stereo power amplifier manufactured in the early 1990s, with MkII versions produced into the early 2000s. It uses eight EL34 power tubes and four 6922 driver tubes, praised for its musicality, low THD (<0.05% in audio band), and stable power delivery across impedances. Reviewed positively by Stereophile (Class B), it is now a collectible item no longer in production, available primarily on the used market. Tested units often show ~90-100W output, with adjustable bias and excellent build quality. Variants include RM-9, RM-9 MkI, and RM-9 MkII, with minor schematic differences.