MartinLogan Classic ESL 9

Frequency Response 34–23,000 Hz ±3dB
Recommended Amplifier Power 20 – 400 watts per channel
Horizontal Dispersion 30°
Vertical Dispersion 112cm line source
Sensitivity 90 dB/2.83 volts/meter
Impedance 4 Ohms, 0.8 at 20kHz Compatible with 4, 6, or 8 Ohm rated amplifiers.
Crossover Frequency 380Hz
High Frequency Transducer XStat™ CLS™ electrostatic transducer
Panel Dimensions: 112 x 23cm
Radiating Area: 2,576 cm²
Low Frequency Transducer Two 8” (20.3 cm) cast basket, high excursion, rigid aluminium cone woofers with extended throw drive assembly, non-resonance asymmetrical chamber format
Components Custom-wound audio transformer, air core coils, low DCR steel laminate coils, polyester capacitors
Signal Inputs Custom 5-way bi-wire tool-less binding posts
Power Draw Max: 2W per channel Standby: <1W per channel
Weight 35.4 kg
Dimensions 152cm x 26.4cm x 64.6cm