The Stax SRM-252S energiser is an exclusive headphone amplifier for driving STAX Earspeakers with PRO-bias 5 pins. The 2RCA line input sockets can be connected directly to the audio output of a source component. The SRM-252s has a simple circuit design that excels in sound reproduction, it employs carefully selected transistors and FETs that delivers superb Earspeaker driving performance.

Moreover, the class-A amplification throughout the stages has no coupling capacitors and reproduces the finest nuances in the music. Although the SRM-252S includes a class-A DC amplifier in a compact CD size case, the internal heat is effectively dissipated through the aluminium chassis extrusions to improve the reliability over a long period of time. Also, the parallel output terminal has been added to distribute the source signal so that a loudspeaker may also be simultaneously used when source equipment has only a single pair of output terminals.

Technical Specification:

Frequency response: DC – 35kHz
Rated input level: 125mV (at 100V output)
Gain: 58dB
Harmonic distortion: 0.01% or less (at 100Vr.m.s. / 1kHz output) Input impedance: 50kΩ(RCA)
Input terminal: RCA x 1
Maximum output voltage: 280Vr.m.s. / 1kHz
Standard bias voltage: DC580V
Power consumption: 4W
Operating temperature / humidity: 0 to 35 degrees C / less than 90% (non condensing)
Dimension: 132 (W) x38 (H) x132 (D) mm (protruding portion not included)
Weight: 540g