Earspeakers provide the standards by which audio quality is judged. It's the driver unit that underpins this quality, and this unit has now evolved into an appropriately shaped stand form. The SRM-300 driver unit is now available! The circuit configuration takes over the pure-balance, A Class, all-stage DC amplifier configuration developed by STAX in the past to drive our electrostatic earspeakers. An ideal balance amplifier configuration has been realized at the input stage, and the input coupling condenser has been done away with by adopting a low-noise FET input high-quality sound operational amplifier. The output stage consists of a simple inverting amplifier based on low-noise FETs and high voltage transistors. The balance circuits which are often incorporated into high-end pure audio amplifiers are operated on a push-pull basis by two electrodes. This makes it possible to hear the original sound in its pristine state thanks to the electrostatic method that drives the diaphragm. The power section supporting this ideal configuration incorporates a unique, stabilization power source, which regulates any unevenness in the power supply and a fluctuation in the bias voltage and realizes clear sound quality. Equipped with a parallel output terminal which passes the input signal and enables connection to another amplifier. This assures functional operability enabling you to enjoy listening as you wish with either earspeakers and loudspeakers. A push-pull signal is obtained by low-noise FET input OP Amp, for ICL input. The output stage consists of a simple inverting amplifier based on low-noise FETs and high voltage transistors. The SRM-300 adopted the regulated power for clear sound in bias voltage and power supply. Attachment of parallel input and output terminals make with connection to an amplifier for loudspeaker and earspeakers. PDF Brochure with Connection Diagram Frequency response 4~60kHz (with 1x SR-202) Rated input level 200 mV / 100V output Maximum input level 30 V r.m.s. at minimum volume Amplification: 54 dB (x500) Total harmonic distortion  0.02% / 1 KHz, 100 V r.m.s. output Input impedance 70KΩ RCA Maximum output voltage: 350 V r.m.s. / 1 kHz Standard bias voltage PRO DC580V Power voltage AC100V, 50/60Hz Power consumption 10 W Temperature range for use Between 0-35 degrees, max. 90% (no condensation) Dimensions 85 (130 for legs)x275x130 mm Weight 1.7 Kg Total weight in box 2.5kg

Japan Made. Highest manufacturing standard Contents .. SRM-300 Driver Unit powered on AC100V 10W. We sell Voltage Converter with input plugs North America, or Europe, UK. Japanese Manual with adequate diagrams. Supplied by Authorized Resellers in Japan with standard manufacturer's warranty. Manufacturer's Japan Warranty 1 year labor/parts from the day you receive. We can help you liaise with the Japan repair centre. You will pay for postage to/from our Japan office.   300 or 310? srm-300 is the Japan version, running on Japan's AC100v. srm-310 is the International version, and runs on ac120~240v. We dont have this version.   Buy Stax Accessories HPS-2 Wood Headphone Stand CPC-1 Clear Plastic Cover SRE Pro Extension Cable