Stax SRD-7/Mk-2 Energizer (Pro + Normal outputs)
Will Ship To: Anywhere
Up for sale is a Stax energizer or "transformer box". The SRD-7/Mk-2 has both Pro and Normal bias outputs so it can power all Stax electrostatic headphones. It plugs in to generate the bias supply voltage, but needs a power amplifier to drive the electrostatic transducers through its output transformers. The sound quality depends largely on the amplifier you use.
I modified the SRD-7 to accept speaker wires directly from the new terminals in the rear, instead of the old Stax cord of poorer quality. The binding posts are wired directly to the transformers, bypassing the main switch. All the switch does now is turn the bias supply, it does not reroute the signal. The unit sounds very clean and with the right amp produces very detailed and dynamic music.
Cosmetically there are some scratches on the front but otherwise is in good used condition.
Shipping will be extra.