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MartinLogan Depth i High-Performance Triple 8-Inch Servo-Control Subwoofer (Single Maple)

BalancedForce triple woofer alignment for near-total cancellation of cabinet vibrations that muddy the bass
Three high-resolution 8-inch aluminum cone woofers with triple servo control for ultimate precision bass
25Hz Level Control - 10dB to compensate for acoustically destructive room interaction in the low-frequencies
Frequency response 20-120 Hz 3dB Anechoic through LFE effects input
350 watt 900 watt peak high-resolution amplifier