Stax SRM-400S Earspeaker Driver Unit

Stax SRM-400S Earspeaker Driver Unit

Name: Stax SRM-400S Earspeaker Driver Unit
Brand: Stax
SKU: 4996476001022
Price: 3000.00 NZD
Availability: OutOfStock

$3,000.00

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The Stax SRM-400S Earspeaker Driver Unit is a mid-range, solid-state amplifier designed to power Stax's high-end, electrostatic headphones. It boasts several exciting improvements over previous models and delivers exceptional sound quality for audiophiles seeking to elevate their listening experience with Stax's electrostatic headphones.

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Specifications

Type: All-stage FET configuration DC amplification driver unit

Frequency response: DC – 90kHz (with one SR-L500 MK2)

Gain: 60dB

Harmonic distortion: 0.01% or less (1kHz/100Vrms output)

Input impedance: 50kΩ (RCA), 50kΩx 2 (XLR)

Maximum output voltage: 400Vrms (1kHz)

Bias voltage: DC 580V

Operating temperature / humidity: 0 to 35 degrees C / less than 90% (non condensing)

Input terminal: RCA x 1, XLR x 1(mutual exclusion input)

Output: RCA parallel output terminal

Power consumption: 30W

Dimension: 195 (W) x 102 (H) x 376 (D) mm (maximum protruding portion included)

Weight: 3.4kg

SRM-400S is a rock-solid performer

Soundstage Australia

Enhanced sound quality

The SRM-400S utilizes a newly designed power transformer and all-stage FET amplification, resulting in lower distortion and a wider frequency response. This translates to a more accurate and detailed listening experience.

Improved build quality

The unit features a sturdier aluminum chassis that minimizes vibrations and external noise interference, contributing to a cleaner audio output.

Versatility

It offers both RCA and XLR inputs, making it compatible with a variety of audio sources.

Who is this for?

The Stax SRM-400S Earspeaker Driver Unit is a mid-range, solid-state amplifier designed to power a range of Stax electrostatic earspeakers. It suits listeners building their first dedicated desktop electrostatic system, or upgrading from a bundled system's included driver unit.

It's well suited to pairing with Stax's Lambda series earspeakers, such as the SR-L300 or SR-L500, giving a genuine step up from entry-level bundled systems without moving into Stax's higher-tier tube-based driver units.

It's a strong mid-tier choice for listeners serious about their electrostatic system but not yet ready to invest in a vacuum tube driver unit.

Frequently Asked Questions

In my view, SRM-400S is a rock-solid performer that deserves the attention of anyone who’s looking for an affordable electrostatic headphone amplifier capable of driving high-end earspeakers. Its sound is undistorted, sparkly and exciting to a degree that puts it tantalisingly close to amplifiers with a much higher price tag. It would be well worth your effort to audition it when you can.