I am very interested in trying out one of these amps. Let me know all the details such as manufacture date, tube set, extra tubes, original box and manual etc.
Cheers, Bob

And an RM9 MkII on ebay.

18-ish

I missed out on the one on the 'Gon. I will contact the ebay seller with the RM-9 mkii. What do these normally sell for on the used market?

Sure thing!  Let us know your thoughts after you've had a while with it.

Thanks for the heads up rbwalt. I don't plan on changing the tubes as factory fresh ones were installed before  I bought mine. I am in aural bliss. I am just trying the 4 ohm taps with my Merlin TSM Mxe and the sound is very smooth (less distortion?). It makes for a very relaxed listening experience.

Robert, as you know, Roger would proabably recommend the 4ohm tap for a number of reasons. Have you done that? If so, what were your observations?

I haven't experienced the 4-ohm tap sounding any better than the 8 ohm.  However, it's easier on the tubes.  I think Roger recommends using the 4 ohm if you can achieve satisfactory volume levels without clipping.

I found the sound on the 4 Ohm tap too sluggish.

Hi, We still have a few RM-10 MK II for sale at the $1450 special offer. Price including shipping. Visa, MC or Discover accepted. I love this amp, its all hand wired, very powerful, compact and attractive. I get great compliments on the sound. The only negative I hear (indirectly) is that it looks too small. I styled the amplifier to be in harmony with the rather slender EL 84 tubes. Are we now pricing amplifiers by the square foot and the pound?

rbwalt is correct about the RM-9 input sockets. They do get loose over time but can be replaced and we have a mechanical fix for those who love to roll tube till the cows come home.

Do keep in mind that these amps are now 25 years old and BTW, the electrolytics are just fine. We can bring these amps to better than new for $600 typically.

On the subject of taps, a tap lower than the speaker impedance generally results in better midrange detail, tighter bass, extended and more even frequency response. If a speaker sounds sluggish I would guess it likes the higher tap which will result in less damping, loose if you like.

I believe I bought this unit from rrboogie - his listening environment has changed.

Excellent amp (my second stay with RM9 Mk II). Driving my ProAc Response 2.5 from 4-Ohm tap with lots of authority and headroom. Nice combination of tight, almost solid-state bass and vivid tube midrange. ProAc 2.5 are low sensitive speaker (83 DB), and they sound a bit anaemic with my Quicksilver monos (~40 watts from 4-Ohm tap, EL34-based) and a passive volume control. RM9 wakes them up. My only complaint is that the unit has no gain switch, and (must probably) is pre-wired in medium gain setting. A bit too tight for these speakers. From my memories of the RM-9 unit I had before, high gain setting opens up the sound due to lower feedback, deepen the soundstage, and gives even more headroom with the passive volume control.

I am trying to contact Roger for the schematics and R/C values that I could change to wire it for high gain. No reply so far – summertime I guess.  If anyone who has the schematics could email me on the location and values of R/C for the gain switch, I would appreciate it.