Stax SRM-270S Driver Unit for Stax Headphones

The SRM-270S amplifier

The SRM-270S is specially designed for the SR-X1 and forms a perfect unit with the headphones. This is the first Stax entry-level headphone to be equipped with round electrostatics, which represents a significant innovation in the company's product portfolio. The amplifier offers a variety of technical refinements that further optimize the sound experience.

High-quality components

The SRM-270S is equipped with RCA sockets that enable excellent signal transmission. The amplifier's complex circuits are designed to precisely reproduce even the finest musical details. The three-millimeter-thick aluminum front panel not only contributes to the stability of the device, but also gives it a high-quality, solid feel that is pleasant to use.

heat dissipation and construction

To ensure that the amplifier does not overheat during longer listening sessions, Stax has enlarged the aluminum housing , which makes heat dissipation more efficient. This robustly constructed outer shell ensures that the amplifier delivers consistent performance even under high loads.

Electronics and Signal Processing

Inside the amplifier, the latest low-noise FET (Field-Effect Transistor) operates in the input stage, which ensures extremely precise and low-distortion signal processing. In the output stage, an emitter-follower circuit with brushes is used, which ensures high performance and clean signal amplification. To enable easy integration into existing HiFi systems, the SRM-270S has parallel output connections (RCA) that enable uncomplicated connection to various audio sources.

Technical data SRM-270S

• Frequency response: DC - 35,000 Hz
• Gain: 58 dB
• Harmonic distortion: 0.01% or less (at 1 kHz / 100 Vrms output)
• Input impedance: 25 kO
• Maximum output voltage: 280 Vrms (at 1 kHz)
• Bias voltage: DC 580 V
• Operating temperature: 0 to 35 °C
• Humidity (operating): less than 90% (non-condensing)
• Input connector: RCA x 1
• Output: RCA Parallel Output x 1
• Power consumption: DC12 V / 500 mA
• Dimensions: 132 mm (width) x 38 mm (height) x 153 mm (depth)
• Weight: 540 g