STAX SRM-400S driver amplifier for electrostatic headphones

With the SRM-400S transistor driver amplifier, STAX offers an advancement of the proven SRM-353X mid-range model as the ideal power supply unit for the electrostatic headphones from the traditional Japanese manufacturer, such as those in the Lambda series (STAX SR-L300, STAX SR-L500 MK2, STAX SR-L700 MK2) or for upgrading the entry-level SRS-3100 system.

What is new?

The SRM-400S features a newly developed DC amplifier stage modeled after the sophisticated circuit design of the flagship SRM-700S amplifier. With specially manufactured, extremely low-noise DUAL-FET transistors, the outstanding sound quality of the amplifier is raised to a new level. For improved efficiency combined with lower power consumption, the SRM-400S is also equipped with a new transformer with separate windings for the high and low voltage circuits. The better-stiffened, low-resonance steel chassis with an increased proportion of non-magnetic aluminum effectively reduces both vibrations and eddy currents, providing the SRM-400S with an even more undisturbed operating environment.

Through the improvement of components and changes to the circuit layout, the new transistor driver amplifier sets entirely new sound standards in this price range.

Connection versatility

STAX driver amplifiers for electrostatic headphones can be operated via the recording output (Tape/Record Out or Fixed Out) or another fixed-level output (Pre Out/Fixed Out) of a preamplifier or integrated amplifier. Naturally, a CD player or a turntable with a separate phono preamplifier can also serve directly as a signal source. The music signal present at the input of the driver amplifier can be looped through – thus, an additional device can also be supplied with music signals. A separate D/A converter is required for the digital connection of a source device.

Finish

Brushed aluminum front in silver / dark gray body.

Transistor output stage without negative feedback

Fully symmetrical circuit design

Volume/balance control via quadruple potentiometer

One switchable input:
Optionally balanced (XLR) or unbalanced (RCA/phono)

One unbalanced output (RCA/phono)

Two headphone outputs (simultaneous operation of two STAX headphones possible)

Dimensions W x H x D:
195 x 102 x 346 (376 with knob and jacks) mm

Weight:
3.4 kg

Herstellerangaben:

STAX International
Room 2101, 21st Floor, The L. Plaza,
Queen's Road,
367-375 , Hong Kong
China
enquiry@staxheadphones.com

Verantwortliche Person:

ATR – Audio Trade HiFi – Sales Company LLC
Wallufer Strasse 2
65343 , Eltville am Rhein
Germany
stax@audiotra.de