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ESL-2905 - Electrostatic Loudspeaker

The ESL-2905 is the largest of our full-range ESL models. It employs six electrostatic panels, the inner two utilising the concentric rings of anodes used to create the point source image. Whilst all electrodes receive the same music signal, each electrode area reacts slightly differently, such that treble frequencies appear to come from the centre of the speaker. This often leads to the belief that a crossover separates the signals, but this is not the case. The outer panels (three above and three below), are linear panels, the entire surface of each reacting in unison to the signal. The large overall surface area is necessary to provide deep bass extension and dynamic response. Construction is a combination of tensioned aluminium extrusions coupled to stainless steel support structures, with a piano gloss wooden trim. The substantial base construction is finished with piano gloss side cheeks and high-quality terminations. Internally, the highest quality components are used, including rare core transformers and high-grade audiophile capacitors. Three types of protection system are used to ensure the speakers are difficult to damage when over driven. A rigid three-dimensional structural support system, combined with an overall speaker mass of 41.6kg ensures the maximum transmission of sound energy resulting in the most dynamic and powerful Quad ESL ever produced.
CONSTRUCTION  Format: Floor standing dipole with 3° fixed tilt blackType Multiple Electrostatic Drive MembranesMembrane Ultra Low Mass (0.5gm) Tensioned FilmNo. of Panel Elements 6Time Delay Progressive Concentric RingsChassis Structure Heavy Duty Composite Aluminium / SteelACOUSTIC PERFORMANCE  Maximum Output 2 N/㎡ at 2m on axisSensitivity 1.5 mbar per volt referred to 1m(86dB/2.83V RMS equivalent)Impedance 8 Ohms nominalImpedance Variation 4 - 20 OhmsMaximum Input Continuous input voltage (RMS): 10VProgramme Peak for undistorted output: 40VPermitted peak input: 55VFrequency Reponse 32Hz - 21kHz (-6dB)     28Hz - 21kHz (useable)Directivity Index See Polar DiagramsDistortion (100dB @ 1M) Above 1000Hz 0.15%Above 100Hz 0.5%Above 50Hz 1.0%Directivity Index See Polar DiagramsELECTRICAL  AC Input 220 - 240V or 110-120VPower Fuse 63 mA anti-surge, 200-240V100 mA anti-surge, 100-120VGENERAL  Power Consumption 6WDimension (H × W × D) 1430 × 695 × 385 (mm)(add 25-55mm for feet)Net Weight 41.6kg each


Note:The right is reserved to alter performance, specification and appearance as required

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