Stax SRM-727 Mk2 Brochure

NEW PRODUCTS NEWS
electrostatic audio products
Provisional information
New vistas for the non-feedback output stage
Features
The electrostatic method is a playback method which involves the installation of drive electrodes
on either side of a high-polymer film diaphragm with a thickness of only a few microns into each of which a plus signal and a minus signal are input.
This means that XLR connection with a pure balance output CD player makes it possible to
listen to the original sound permitted by the balance system without a conversion circuit.
The output stage has been incorporated by newly developing a non-feedback (NON-NFB) large
current emitter follower A class amplifying circuit. This makes it possible to achieve a much more vivid and dynamic sound quality.
The emitter follower at the output stage makes it a possible to achieve lower impedance. A major
expansion in dynamic range in the high frequency has also been achieved.
DC amplifier configuration without the use of a coupling condenser.
A high sound quality, low noise FET is used at the input stage with a simple two-stage amplifying
circuit. A natural and pure sound quality with high information quantity is realized.
Moreover, when connecting your favorite attenuator or pre-amplifier, a direct switch that avoids
duplication of the volume unit is included.
Use of parts takes account of sound quality, performance and the environment.
In order to avoid magnetic distortion, the chassis makes use of aluminum materials, thereby
contributing to a high level of purity of sound.
Amplification is set at a low level, thereby facilitating subtle adjustment of volume during XLR
input and when using high-output CD players, etc.
Parallel output terminals are included to enable the signal to pass through unhindered. A new
panel face has been designed with rounded corners and a silver hairline finish. Earspeakers of the PRO bias (5-pin) type can be used.
Control functions are restricted to the volume, and the input uses a single system for selecting
RCA or XLR.
This is a drive unit for exclusive use with earspeakers with emphasis placed first and foremost
upon purity.
Standard model
Front panel color : Silver
Black front panel
Specifications
Frequency properties: DC-115 KHz / SR-007 or SR-404 Signature, when using 1 unit
Rated input level: 200 mV / 100 V Outputs
Maximum input level: 30 V r.m.s. / at Minimum volume (Variable mode)
Amplification: 54 dB (x 500)
Total harmonic distortion: Less than 0.01% (1 KHz10kHz, 100 V r.m.s. output )
Input impedance: 50 K / XLR balance 50K×2
Number of inputs: RCA XLR (balanced)
Maximum output voltage: 450 V r.m.s. / 1 KHz
Standard bias voltage: DC 580 V
Power voltage: 120-240V ±10%, 50 to 60 Hz (adjusted for your area)
Power consumption: 46 W
Temperature range for use: 0 to 35
External dimensions: 195 (w) x 103 (h) x 420 (d) mm (including VR knob and pin jack (20 + 10)
Weight: 5.2 Kg
The standards and external appearance of this unit may be changed without prior notice in order to make improvements.
STAX LTD.
7-1 Chikumazawa-higashi, Miyoshi-mach, Iruma-gun, Saitama-prefecture, Japan. 〒354-0046
SRM-727II Rear view
TEL:049-258-3988 FAX:049-258-2659 URL:www.stax.co.jp