Aurex PreAmp SY-335MkII + Amp SC-335MkII January 13, 2021 by mercury $45 for both. Used Aurex/Toshiba Preamplifier SY-335 MK-II-B Used Aurex/Toshiba Amplifier SC-335 MK-II-B Both units were plugged in and powered up. Otherwise, UNTESTED. Do NOT know if both Preamp and …