Stax SRE-925S
Stax 2.5 m extension cable with proprietary 5-pin connectors, compatible with all of the brand's electrostatic headphones.
Description
The SRE-925S is an extension cable from Stax, designed to extend the cable length between one of the brand's electrostatic headphones and its dedicated amplifier. It connects via a proprietary Stax 5-pin connector, female on one side and male on the other, allowing it to be inserted between the headphones and their original cable without an adapter.
The conductor adopts an ultra-flat shape and combines pure OFC copper wires with a solid 6N-AG silver plating. This combination aims to preserve the integrity of the audio signal along the entire length of the cable, a particularly sensitive point on electrostatic headphones where the transmitted voltage level is high and where the quality of the connection directly affects the sound output. Stax states that this extension cable uses the same cabling technology as that employed in its flagship SR-009 headphones.
With its length of 2.5 metres, the SRE-925S is aimed at domestic use where one wishes to move further away from the electrostatic amplifier, for example to sit in an armchair away from the listening position or to allow freer movement without being restricted by a cable that is too short.
The common feature across all Stax headphones that makes this extension cable compatible is the proprietary 5-pin connector, used from the brand's very first models through to current versions.
What to check before buying used
The proprietary 5-pin connector, both male and female, must fit without play or bent pins, otherwise the high-voltage signal from the electrostatic headphones may be cut or degraded. The ultra-flat sheath, through repeated handling or bending near the plugs, may crack and expose the 6N-AG silver plating, which should be checked along the entire length. A listening test on both channels can help detect any internal break in one of the strands.
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