Grotto i deploys the full array of MartinLogan's advanced subwoofer technologies to achieve deep, rich, satisfying bass while preserving electrostatic-like accuracy and detail. Its advanced low-distortion switching amplifier and sophisticated servo control system extract the very best possible performance from Grotto i's high-resolution 10-inch aluminum-cone driver. A powerful 300 watt (900 watt peak) low-distortion, high-reliability amplifier gives Grotto i extremely articulate bass without need of exaggerated amplifier power ratings or transient-blurring ported or passive radiator enclosures common to many modern subwoofers. A proprietary servo system further ensures that output from Grotto i's 10-inch high-resolution aluminum cone woofer is dramatically free of distortion and provides a faithful replica of the audio input signal. An optimized selection of connections and controls allow connection of both 2-channel stereo music and multi-channel home theater while allowing each connection to have unique crossover and level settings. LFE input effectively uses no low-pass filter, leaving crossover control to the processor. Left/right line level and speaker level inputs integrate six discrete audiophile grade low-pass filters between 30-80Hz allowing a different level and crossover point when playing back two channel music. RCA output allows multiple Grotto i subwoofers to operate in series. A unique 25Hz level control allows adjustment of system response by ±10dB to eliminate low-frequency build-up or suck-out at a room's most problematic bass frequency. ETC spikes couple the sub directly to the floor, minimizing lost energy and allowing tight, well defined bass in any system.
High-resolution 10-inch aluminum cone woofer with servo control for ultimate precision bass
LFE and stereo inputs can be connected simultaneously with separate level and crossover settings for each, enabling precise optimization for home-theater and stereo music playback in the same system
25Hz Level Control (+/- 10dB) to compensate for acoustically destructive room interaction in the low-frequencies
Frequency response: 22?120 Hz ±3dB; Anechoic through LFE effects input
300 watts at less than 0.5% THD (900 watt peak) high-resolution amplifier