Audio Research SP8 MK II Sounds

I had an SP8 for almost 20 years.The choice of tubes is important.It is a glorified Dynaco PAS III,actually,and it will never sound transparent.Try Mullards for the 12AX7s,and Siemens E83CCs for the 6922s.I tried many many different tubes-and those worked best.I had the MK. IV.

Click on Discussion Forums from the home page and scroll down to audio clubs. You might find something in Florida. Or try audioasylum.

Thanks for all the helpful tips. It is time for some experimenting with different cables and tubes! I will let you know how things work out.

I think Reylon meant to say E88cc for the 6922. The E83cc or Ecc83 is a 12ax7. Speaking of Mullard 12ax7, the best, although rarer and expensive is a late 50's long plate, square getter( magical sound in the right circuit) Also, find an early pair of Siemens Cca( lower noise version of their E88cc,6922).

I have owned an SP8 for some years and am very familiar with the C-20 Mac. There is no way the SP8 is forward or boxy. It is extremely airy, rich and musical. The C-20 just does not compare. My guess is the Krell may have too low of an input impedance and loads down the SP8. Many high dollar tube preamps, like the SP8, do not work well with all solid state amps. The Sp8 is one of the best preamps ARC has produced and it exudes listenability. Voices are really special and real sounding. The phono section which is a moving magnet and quite good.
One other thought is that 861 is a little to clinical and solid state sounding in it's stock form. The Great Northern Sound mods transform it, making it warmer, smoother and richer sounding.