Martin Logan Balanced Force 212 Subwoofer - Floor Stock

Martin Logan

$6,999.00 was $7,999.00

  • Martin Logan Balanced Force 212 Subwoofer - Floor Stock
  • Martin Logan Balanced Force 212 Subwoofer - Floor Stock
  • Martin Logan Balanced Force 212 Subwoofer - Floor Stock
  • Martin Logan Balanced Force 212 Subwoofer - Floor Stock

This product is currently sold out.

Ultimate Performance Subwoofers


Chances are you've read or heard at some time that adding a subwoofer to a system built around electrostatic speakers is nearly impossible. Although that's not necessarily true (and we have the subwoofers to prove it), the idea is grounded in experience. For many years subwoofers and electrostats did not blend very well. Turn on the sub and maybe you got the deeper, stronger bass you were looking for but that wonderful electrostatic snap and midrange clarity were, if not gone, now smeared and disconnected.

Our goal, when we began our first subwoofer project, was to deliver the good stuff — deep, tight, powerful bass — and none of the bad. We wanted to build subwoofers that, when combined with ultra-fast electrostatics or conventional cone speakers, would blend seamlessly to the very bottom of the frequency extreme. BalancedForce subwoofers are the full realization of years of engineering by the MartinLogan team combined with the latest innovations in advanced digital signal processing, amplification, electrical system designs, and room correction.

BalancedForce® Alignment
Opposing Aluminum Element Woofers
for Deep, Clean Bass
Dual low-distortion woofers pair a high-power magnet structure with 12-inch aluminum cone diaphragms to deliver huge excursion and sound output while preserving minute bass details, all without a hint of distortion. The cone material's exceptional damping properties ensure the smooth, non-resonant response necessary for seamless blending with high-resolution full-range loudspeakers.

These woofers, spaced 180 degrees apart in a 'BalancedForce' configuration, operate in exact opposition, to nullify distortion causing cabinet vibrations and deliver pure bass energy. Traditional subwoofer enclosures suffer from an equal and opposite reaction to the cone's movement, generating acoustic vibrations within the cabinet. You feel this by touching the cabinet. Although the "physics" of this phenomenon actually cause a subwoofer cabinet to resonate or even dance, most subwoofer designers apply weight or mass to the cabinet to minimize such disturbances, but still leave one byproduct—"smeared bass". BalancedForce is an elegantly simple solution that removes the variable of cabinet vibration contributions from the acoustic equation.Technical Specifications

Amplifier Design
Advanced Ultra-Efficient D-Class Amplifier
BalancedForce subs match powerful proprietary switching amps with incredible woofer drivers resulting in tightly defined bass while keeping distortion at the lowest possible levels. The BalancedForce 210 features an 850-watt class-D switching amplifier capable of a 1700-watt peak operating at over 90% efficiency. BalancedForce 212 features dual 850-watt amplifiers (one for each woofer) with a total system power of 1700-watts (3400-watts system peak).

Low-noise, high-power transformers and switching power supplies feature high-quality MOSFET transistors, noise-suppression networks, and control circuitry to provide tremendous levels of current with extremely low levels of distortion. Split power supply rails minimize distortion while maximizing switching efficiency. Military grade glass epoxy circuit boards, temperature sensors, and protection circuitry guarantee quality sound and reliable trouble-free operation.


PBK Room Correction & 25Hz Level Control
Although correct placement plays a key role in optimizing subwoofer performance, positioning a subwoofer often requires compromises. The optional MartinLogan Perfect Bass Kit (PBK, sold separately) uses a computer and microphone to listen throughout the listening environment and tailor the sub's performance to the unique acoustic properties of a room—resulting in clean, powerful bass down to the lowest frequencies.

Additionally, a built-in 25Hz level control allows listeners to adjust subwoofer output by ±10dB and compensate for excessive room gain by cutting output in the 20- to 30-Hz range, or to accentuate the feeling of deep-bass energy by augmenting those frequencies.

BalancedForce 212

System Frequency Response 18–120 Hz ±3dB; Anechoic through LFE effects input 20–120 Hz ±3dB; 
Low Pass Filter Frequencies 30 - 80Hz 
Phase 0°, 90°, 180°, 270° 0°
25Hz Level Control ±10dB at 25Hz ±10dB at 25Hz
Power Control On, Auto (12V Trigger), Off On, Auto (12V Trigger), Off
Room Correction Perfect Bass Kit (PBK) Ready (Sold Separately)
Woofers Two 12" (30.5cm) cast-basket, highexcursion, aluminum cone with extended throw driver assembly, sealed non-resonant asymmetrical chamber format 
Amplifiers 2 x 850 watts
(3,400 watts peak system total) 850 watts
(1,700 watts peak)
Inputs RCA: Left, Right and LFE.
XLR: Left, Right and LFE.
Speaker Level: Left and Right banana jacks.
12V Trigger: 3.5mm
Mini USB (for PBK)
USB (for crossover & firmware updates) RCA: Left, Right and LFE.
XLR: Left, Right and LFE.
Speaker Level: Left and Right banana jacks.
12V Trigger: 3.5mm
Mini USB (for PBK)
USB (for crossover & firmware updates)
Output (RCA) Multi Out (for multi-sub connection) Multi Out (for multi-sub connection)
Input Impedance RCA: 10,000 Ohms
XLR: 15,000 Ohms per phase
Speaker Level: 10,000 Ohms per phase (20,000 Ohms red to black)
Power Draw Typical: 250 Watts
Idle: 30 Watts Typical: 125 Watts
Idle: 15 Watts
Weight 140lbs. (63.5kg) each 96lbs. (43.5kg) each


Overall Dimensions
HxWxD  ( 57.4cm x 57.4cm x 58.2cm)

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