{"product_id":"stax-srm-400s","title":"Stax SRM-400S","description":"\u003cspan\u003e\n\u003c\/span\u003e\u003cspan\u003e\u003cb\u003eSTAX SRM-400S Driver Amplifier for Electrostatic Headphones\n\u003cbr\u003e\n\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eTransistor output stage without negative feedback\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSymmetrically designed circuit\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVolume\/balance control via quadruple potentiometer\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOne switchable input: either balanced (XLR) or unbalanced (RCA\/Cinch)\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eOne unbalanced output (RCA\/Cinch)\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eTwo headphone outputs (simultaneous operation of two STAX headphones possible)\n\u003cbr\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cspan\u003e\n\u003cbr\u003eWith the SRM-400S transistor driver amplifier, STAX offers a further development of the proven SRM-353X mid-range model as an ideal power supply 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 model SRS-3100.\n\u003cbr\u003e\n\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cb\u003eWhat's new?\n\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003eThe SRM-400S features a newly developed DC amplifier stage, modeled on the sophisticated circuit design of the SRM-700S top-of-the-line amplifier. With specially manufactured and extremely low-noise DUAL-FET transistors, the amplifier's outstanding sound quality is once again raised to a new level. For improved efficiency with simultaneously 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 and resonance-free steel housing with an increased proportion of non-magnetic aluminum effectively reduces both vibrations and eddy currents, providing the SRM-400S with an even more undisturbed working environment.\n\u003cbr\u003e\n\u003cbr\u003eBy improving components and modifying the circuit layout, the new transistor driver amplifier sets entirely new sonic standards in this price range.\n\u003cbr\u003e\n\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cb\u003eConnectivity\n\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003eDriver amplifiers for STAX electrostatic headphones can be operated from the recording output (Tape\/Record Out or Fixed Out) or from another output with a fixed level (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 serve directly as the signal source. The music signal present at the input of the driver amplifier can be looped through – thus, another device can be supplied with music signals. A separate D\/A converter is required for digital connection of a source device.\n\u003cbr\u003e\n\u003cbr\u003e\u003c\/span\u003e\u003cspan\u003e\u003cb\u003eNote on the operating voltage (polarization voltage) of STAX headphones\n\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003eMany early STAX headphones are designed for an operating voltage of 230V\/DC. Headphones of the PRO series – including all current models – require a higher operating voltage of 580V\/DC.\n\u003cbr\u003eIn the past, driver amplifiers were offered which also provided both operating voltages. Current devices only have connections for the higher operating voltage of 580V\/DC.\n\u003cbr\u003eTo avoid confusion, the connection jacks for the different operating voltages have different contact configurations.\n\u003c\/span\u003e\u003c\/p\u003e","brand":"Stax","offers":[{"title":"Default Title","offer_id":52457238561034,"sku":"142535","price":1600.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0717\/5340\/0586\/files\/img142535_63114.jpg?v=1769454512","url":"https:\/\/hifi.shop\/en\/products\/stax-srm-400s","provider":"Hifi \u0026 Friends GmbH","version":"1.0","type":"link"}