MartinLogan BalancedForce 212 subwoofer Specifications

Sidebar 1: Specifications

Description: Powered subwoofer with sealed, nonresonant, asymmetrical chamber. Drive-units: two 12" (305mm), high-excursion aluminum-cone woofers with cast baskets. Amplifiers: two, each 850W class-D. Frequency response: 18–120Hz, ±3dB; anechoic through LFE input. Low-pass filter frequencies: 30–80Hz. Phase settings: 0°, 90°, 180°, 270°. 25Hz level control: ±10dB at 25Hz. Power control: On, Auto (12V trigger), Off. Inputs: Left, Right, LFE (balanced, XLR); Left, Right, LFE (unbalanced, RCA); Left, Right (speaker level, banana). 12V Trigger: 3.5mm mini-USB (for Perfect Bass Kit), USB (for crossover & firmware updates). Output: Multi Out (RCA, for multi-sub connection). Input impedance: 10k ohms (RCA), 15k ohms per phase (XLR). Speaker level: 10k ohms per phase (20k ohms, red to black). Power draw: 250W typical, 30W idle.
Dimensions: 22.4" (574mm) H by 22.4" (574mm) W by 22.7" (582mm) D. Weight: 140 lbs (63.5kg).
Finishes: High-gloss black; top trim available in high-gloss, hardwood, & real-wood veneers.
Serial numbers of units reviewed: ADJ4014652G02, ADJ4013354f12.
Price: $3995 each. Perfect Bass Kit, $100. Approximate number of dealers: 260.
Manufacturer: MartinLogan, 2101 Delaware Street, Lawrence, KS 66046. Tel: (785) 749-0133. Web:

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