{"product_id":"quad-esl-2812x-elecrostatic-loudspeakers-pair","title":"Quad ESL 2812X Electrostatic Loudspeaker (pair)","description":"\n\u003ch1\u003eQuad ESL 2812X Electrostatic Loudspeaker (pair)\u003c\/h1\u003e\n\u003ch3\u003eA compact four-panel electrostatic loudspeaker with point-source time-delay design, UK-made audio transformers, and revised electronics architecture\u003c\/h3\u003e\n\u003cp\u003eThe Quad ESL 2812X brings Quad’s ESL X refinements to a smaller, lighter, and less imposing loudspeaker than the flagship ESL 2912X. Its four-panel design shares the same treble and midrange panels as the larger model, delivering the signature Quad sound with a highly transparent, detailed, and natural presentation.\u003c\/p\u003e\n\u003cp\u003eLike every Quad ESL, the 2812X is built around an electrostatic panel rather than conventional moving-coil drivers. A very light Mylar diaphragm is suspended between stators and driven across its surface, allowing the speaker to respond with exceptional speed, low distortion, and the open, boxless presentation that has made Quad electrostatics famous.\u003c\/p\u003e\n\u003ch4\u003eFour-Panel ESL Performance\u003c\/h4\u003e\n\u003cp\u003eThe ESL 2812X uses a unique four-panel design to deliver much of the character of the ESL X series in a more compact format. At just 42.1\" high, it is easier to place than the larger 2912X while preserving the qualities that define Quad electrostatics: clarity, speed, midrange realism, and a sense of the speaker disappearing from the room.\u003c\/p\u003e\n\u003ch4\u003eElectrostatic Speed and Transparency\u003c\/h4\u003e\n\u003cp\u003eAt the heart of the design is an ultra-light Mylar diaphragm, coated with a high-resistance conductive material and suspended between perforated metal stators. Because the diaphragm is so light and is driven uniformly across its surface, the ESL 2812X is exceptionally responsive to transients and notably low in distortion, especially through the midrange.\u003c\/p\u003e\n\u003ch4\u003ePoint-Source Imaging\u003c\/h4\u003e\n\u003cp\u003eQuad’s concentric-ring electrode design, first developed for the ESL-63, is engineered so the sound appears to radiate from a single point in space. A delay-line system feeds the outer rings of the stators with progressively delayed versions of the signal, helping the speaker create a precise, open, and stable stereo image.\u003c\/p\u003e\n\u003ch4\u003eX-Level Refinements\u003c\/h4\u003e\n\u003cp\u003eFor the ESL X series, Quad reworked the electronics architecture, splitting the operational PCB into separate high-voltage, control\/protection, and low-voltage signal sections. This physically separates the 5.25 kV high-voltage stage from the lower-voltage circuits, reducing interference and improving stability, noise performance, and signal integrity.\u003c\/p\u003e\n\u003cp\u003eThe ESL 2812X also returns to UK-manufactured audio transformers, custom specified for the design and supervised under Quad’s service team. These transformers are intended to improve midrange and high-frequency dynamics, preserve wide bandwidth, and enhance transient attack and microdynamic resolution.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompact Quad electrostatic loudspeaker with four-panel design\u003c\/li\u003e\n\u003cli\u003eShares the same treble and midrange panels as the flagship ESL 2912X\u003c\/li\u003e\n\u003cli\u003eFloor-standing dipole design with 3° fixed tilt\u003c\/li\u003e\n\u003cli\u003eMultiple electrostatic drive membranes with ultra-light Mylar diaphragms\u003c\/li\u003e\n\u003cli\u003ePoint-source time-delay system with progressive concentric rings\u003c\/li\u003e\n\u003cli\u003eHigh-voltage electrostatic operation at approximately 5.25 kV\u003c\/li\u003e\n\u003cli\u003eRevised PCB architecture with separated high-voltage, control\/protection, and low-voltage signal sections\u003c\/li\u003e\n\u003cli\u003eUK-manufactured audio transformers custom specified for the ESL X series\u003c\/li\u003e\n\u003cli\u003eControl and protection circuitry to monitor high voltage, detect faults, and protect against overdrive\u003c\/li\u003e\n\u003cli\u003eMatte black finish with improved acoustic transparency from the new grille cloth\u003c\/li\u003e\n\u003cli\u003eOptional underside LED halo illumination with touch control and adjustable brightness\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cp\u003e\u003cb\u003eFormat:\u003c\/b\u003e Floor-standing dipole with 3° fixed tilt\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eType:\u003c\/b\u003e Multiple electrostatic drive membranes\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePoint Source Time Delay:\u003c\/b\u003e Progressive concentric rings\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eChassis Structure:\u003c\/b\u003e Heavy-duty composite aluminum\/steel\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePanel Elements:\u003c\/b\u003e 4\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMaximum Output:\u003c\/b\u003e 2 N\/m² at 2 m on axis\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eSensitivity:\u003c\/b\u003e 1.5 mbar per volt referred to 1 m; 86 dB\/2.83 V rms equivalent\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNominal Impedance:\u003c\/b\u003e 8 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eImpedance Variation:\u003c\/b\u003e 4–15 ohms\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eMaximum Input:\u003c\/b\u003e Continuous input voltage: 10 V rms; programme peak for undistorted output: 40 V; permitted peak input: 55 V\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eFrequency Response (-6 dB, Usable):\u003c\/b\u003e 37 Hz–21 kHz, 33 Hz–23 kHz\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDistortion (100 dB @ 1 m, Above 1000 Hz):\u003c\/b\u003e \u0026lt;0.15%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDistortion (100 dB @ 1 m, Above 100 Hz):\u003c\/b\u003e \u0026lt;0.5%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDistortion (100 dB @ 1 m, Above 50 Hz):\u003c\/b\u003e \u0026lt;1.0%\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Fuse (100–120 V):\u003c\/b\u003e 200 mA anti-surge\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003ePower Consumption:\u003c\/b\u003e 8 W\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eDimensions (HWD):\u003c\/b\u003e 42.1\" x 27.2\" x 15\" (1070 x 690 x 380 mm)\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eNet Weight:\u003c\/b\u003e 77 lb. (35 kg)\u003c\/p\u003e\n","brand":"Quad","offers":[{"title":"Default Title","offer_id":53595047100600,"sku":"ESL-2812X","price":14995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1564\/1247\/files\/QH_ESL2812_2.jpg?v=1781721909","url":"https:\/\/upscaleaudio.com\/products\/quad-esl-2812x-elecrostatic-loudspeakers-pair","provider":"Upscale Audio","version":"1.0","type":"link"}