Martin Logan

Focus ESL C18



It boasts a depth of just 9.6-inches when mounted flat on a wall. Situated just behind the perforated front grill, fixed in a uniquely designed housing, sits a 7.5 x 18-inch electrostatic panel and Folded Motion tweeter. The combined performance characteristics of the electrostatic panel and the Folded Motion Tweeter ensure precision and hyper-realistic front-stage blending. This kind of mid- and high-frequency performance can only be supported by a foundation of tremendous low-end, so the Focus ESL C18 also features a passive array of twin 6.5-inch aluminum cone woofers, capable of deep bass reproduction down to 50Hz. The Focus ESL C18 is also at home on a shelf or floor stand—just toggle the “On-Wall/OffWall” acoustic contour switch to instantly optimize performance for any mounting position.

System Frequency Response 50–23,000 Hz ± 3db

Recommended Amplifier Power 50–400 watts

Dispersion Horizontal: 30 degrees .

Sensitivity 90 dB/2.83 volts/meter

Impedance Nominal 4 ohms Crossover Frequency 470, 3,000 Hz

High Frequency Driver 1” x 1.4” (2.6cm x 3.6cm) Folded Motion Transducer with 5.25” x 1.75” (13.3cm x 4.4cm) diaphragm.

Mid Frequency Driver 18” x 7.5” (45.7cm x 19.1cm) CLS™ XStat™ electrostatic transducer with total playable area 135 in2 (873cm2).

Woofers Two 6.5” (16.5cm) cast basket, high excursion, rigid aluminum cone 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.

Controls Position: On-Wall / Off-Wall

Signal Inputs WBT-0703Cu nextgen™ 5-way binding posts feature a filigree signal conductor made from gold plated, nickel free, nonferromagnetic, pure copper for high conductivity and fully insulated. Free from eddy current effects.

Weight 50 lbs. each (22.7 kg)

Size (H x W x D, Table Mount) 9.6 x 43.2 x 9.2-inch (24.4 x 109.7 x 23.4 cm)

Size (H x W x D, Installed On Wall, Flat Mount) 9.4 x 43.2 x 9.6-inch (23.9 x 109.7 x 24.5 cm)

Size (H x W x D, Installed On Wall, Angled Up) 11 x 43.2 x 11.2-inch (27.9 x 109.7 x 28.3 cm)

Size (H x W x D, Installed On Wall, Angled Down) 11.3 x 43.2 x 11.5-inch (28.8 x 109.7 x 29.1 cm)