Is an upgrade from the SL1 Reference Preamplifier to a later version available and, if so, at what cost? What exactly does it entail?
Should I get CAT SL-1 mkII updated to mkIII?
I just bought a SL-1 mkII preamp. The tubes are a couple of years old and I was going to retube it(almost $300 for NOS). Would I be better off putting that money toward the upgrade to mkIII($675). Any opinions?