The Music Reference RM-200 has a Tube output[Preferable IMHO].Lamms in 10K range,I'm out!If you are looking for a more accurate sound, this is your amp.Lush,Romantic veiled in any way look elsewhere.I listen mostly to Prog,Blues Rock,Electronic.Also some Older Jazz and symphonic Classical[Mahler].I need an amp that can keep up the pace and this one sure does.Read the reviews and search archives.FYI I use a Bat VK-3i or A Music Reference Pre or no Pre at all as My SACD/CD Tube output player can control my volume.