SRS-2170

Stax SRS-2170

The SR-207 earspeaker has employed　a new sounding unit (sound element). The conventional sound element has simplest structure so that the area of film diaphragm can be used as effectively as possible compared with its external size. Taking full advantage of these conventional features, the new sound element has been packaged in a tough resin case. Thus, the sound has become cleaner and the reliability has been further improved. The thin film of a new material with very little elasticity by temperature or humidity has been adopted for the diaphragm, which has realized both the rich bass with tension and the delicate treble sound.

The SRM-252S is an exclusive driver unit (amplifier) for driving STAX ear speakers with PRO-bias 5 pins. Its line input can directly connect to the audio output terminal of CD player, portable audio player and PC. The SRM-252S has a simple design that excels in sound quality employing the carefully selected newest high-voltage transistors and low-noise FETs. The output stage featuring the emitter-follower configuration reinforces the driving performance and also realized the smooth sound quality. Moreover, the class-A amplification throughout the stages with no coupling capacitors reproduces exhaustively the finest nuance of music. Although the SRM-252S includes a class-A DC amplifier in a compact CD jacket size case, the internal heat is effectively dissipated through the chassis of aluminum extrusion material to improve the reliability over a long period of time. Also, the parallel output terminal was added to distribute the source signal so that a loud speaker may also be simultaneously used when source equipment has only a pair of output terminals.

SR-207 SPECIFICATIONS: 

Type	:Push-Pull electrostatic oval sound element, Open-Air type enclosure
Frequency Response	:7 - 41,000Hz
Capacitance	:120pF (including cable)
Sensitivity	:101dB / 100V r.m.s. 1 kHz
Bias Voltage	:580V DC
Left & Right Channel Identification	:'L' and 'R' indicated on the arc assembly, solid line (left) and dotted line (right) on cable
Ear Pads	:High-quality synthetic leather
Cable	:LC-OFC parallel 6-strand, low-capacity cable, 2.5m full length
Ambient Temperature & Humidity	:0 to 35ºC / 90% max. without condensation
Weight	:12oz without cable / 1.1lb with cable

 

SRM-252S SPECIFICATIONS: 

Type	:All-stage semiconductors, Low-noise dual FET input Class A operation, Pure balance DC amplifier configuration Earspeaker driver unit
Frequency Response	:DC to 35,000Hz with SR-207 (with SR-207)
High Harmonic Distortion	:Max 0.01% (1kHz at 100V r.m.s. )
Gain	:58dB (x800)
Input Terminal	:1 RCA with 1 RCA parallel out
Rated Input Level	:125mV / 100V Outputs
Max. Input Level	:30V (at minimum volume level)
Input Impedance	:50KΩ(RCA)
Max. Output Voltage	:280V r.m.s. (1kHz)
Standard Bias Voltage	:PRO 580V x 1
Power Voltage Frequency	:117V (50Hz / 60Hz)
Power Consumption	:4W DC12V
Temperature & Humidity	:0 to 35ºC / 90% max. without condensation
Dimensions	:5.2 (W) x 1.5 (H) x 5.2 (D) in
Weight	:1.2lbs
Color	:Silver

Specifications and appearance are subject to change for improvement.