MartinLogan Sequel II loudspeaker Specifications

Sidebar 1: Specifications

Description: Two-way, floor-standing loudspeaker with sealed-box bass and electrostatic midrange/tweeter unit. Drive-units: 48" by 10" curvilinear electrostatic panel, 10" plastic-cone woofer. Crossover frequency: 250Hz. Crossover slopes: second-order, 12dB/octave. Frequency response: 28Hz–2kHz –2dB. Bass control switch: shelves response between 28Hz and 250Hz down by 3dB. Dispersion: 30° horizontal (no frequency limits), 48" line source vertical. Sensitivity: 89dB/2.83V/m. Nominal impedance: 6 ohms, with a minimum of 2 ohms. Impedance phase angle: less than 45°. Amplifier requirements: 80–200W. Maximum power handling: 200W. Supplied accessories: glides, carpet-piercing spikes.
Dimensions: 72" H by 14" W by 13" D. Weight: 110 lbs each.
Finishes available: rosewood, gloss black, walnut, light and dark oak.
Price: $2500/pair (1989); no longer available (2008). Approximate number of dealers: 70.
Manufacturer: MartinLogan, 2101 Delaware Street, Lawrence, KS 66046. Tel: (785) 749-0133. Fax: (785) 749-5320. Web:

2101 Delaware Street
Lawrence, KS 66046
(785) 749-0133