Stax SRM-700T OTM Tube Drive Amplifier

Proven, improved

STAX has never followed short-lived trends, and with the replacement of the STAX SRM-007t II and SRM-727 II driver amplifiers, which have been successful since 2006, STAX remains true to itself and this motto. The two new driver amplifiers SRM-700T and SRM-700S benefit from the technologies from the flagship SRM-T8000: In the new tube driver amplifier SRM-700T, which does not require an output transformer (OTL), STAX uses two double triodes of type 6SN7 and non-inductive winding resistors from Vishay Co. as well as custom-made low-noise dual FETs in the first amplifier stage, which are also used in the transistor sibling STAX SRM-700S. It was there that STAX implemented J-FETs in the second amplifier stage of a STAX driver amplifier for the very first time. J-FETs are suitable for particularly low-noise amplification of even the most power-hungry transducers. This is how STAX catapults the performance of both models far beyond their price range.?? STAX has also modernized the look of the amplifiers and tailored an extremely elegant dress to the body.

The STAX SRM-700T is the transistorized alternative to the STAX SRM-700S and plays at the same extremely high level of quality. In comparison, the SRM-700T shines with a more colourful, finer resolution sound image with a powerful bass.

The STAX SRM-700T can operate two STAX headphones at the same time.

STAX electrostatic headphone driver amplifiers can be driven from the recording output (Tape/Record Out or Fixed Out) or from another fixed level output (Pre Out/Fixed Out) of a preamplifier or integrated amplifier. Of course, a CD player or a turntable with a separate phono preamplifier can also be used directly as the signal source. The music signal present at the input of the driver amplifier can be looped through, so you can supply another device with music signals. If a source device is to be connected digitally, a separate D/A converter is required.

finishes

Brushed aluminum front in black / body black or brushed aluminum front in silver / body silver

Technology for good sound

Tube assembly: 2x double triode 6SN7

Output stage without transformer (OTL)

Signal-symmetrical circuit design

Volume/Balance control via a quad potentiometer encapsulated for electrical shielding.

A high-level input, either unbalanced (1 pair of RCA/cinch sockets) or balanced (1 pair of 3-pin XLR sockets). Switching is carried out using a switch in the connection panel

A high level output unbalanced with RCA/Cinch sockets

Technical specifications

Frequency Response: 1Hz - 100kHz (with a Stax SR-009S)

Gain: 60dB

Distortion factor: 0.01% (at 100V rms output voltage and 1kHz)

Input impedance unbalanced: 50kOm

Input impedance symmetrical: 2x 50kOhm

Maximum output voltage: 340V rms. (at 1kHz)

Operating voltage handset: 580V

Power consumption: 54W

Dimensions W x H x D: 240 x 103 x 393mm (with knob and sockets)

Weight: 5.7kg

OTL tube driver amplifier

• For electrostatic headphones
• OTL output stage with 2x 6SN7 double triodes
• 2 headphone outputs
• 1 unbalanced & 1 balanced input
• 1 unbalanced output

Technology for good sound

Tube assembly: 2x double triode 6SN7

Output stage without transformer (OTL)

Signal-symmetrical circuit design

Volume/Balance control via a quad potentiometer encapsulated for electrical shielding.

A high-level input, either unbalanced (1 pair of RCA/cinch sockets) or balanced (1 pair of 3-pin XLR sockets). Switching is carried out using a switch in the connection panel

A high level output unbalanced with RCA/Cinch sockets

Technical specifications

Frequency response: 1Hz - 100kHz (with a Stax SR-009S)

Gain: 60dB

Distortion factor: 0.01% (at 100V rms output voltage and 1kHz)

Input impedance unbalanced: 50kOm

Input impedance symmetrical: 2x 50kOhm

Maximum output voltage: 340V rms. (at 1kHz)

Operating voltage handset: 580V

Power consumption: 54W

Dimensions W x H x D: 240 x 103 x 393mm (with knob and sockets)

Weight: 5.7kg