I'm selling an original MartinLogan Grotto subwoofer for a friend. It has never been used, or even taken out of its original factory packaging! (the pictures are of my Grotto, for illustration.) Please send me an email with any questions, or reasonable offers. I'd prefer PayPal, or CC through PayPal, but I can also take a personal check if you can wait for it to clear before shipping.This Grotto subwoofer makes it easy to add great bass to your home's audio system. Grotto's compact cabinet houses some serious performance enhancing technology, starting with the same low-mass, long-excursion driver used in the flagship Descent subwoofer. A proprietary advanced-design amplifier and a highly sophisticated servo monitoring and control system work together to extract from that driver the greatest possible low-frequency extension and power with absolute minimum distortion. It's amazing to hear deep bass emerge with so much impact from such a small enclosure. A precision crossover and 25-Hz level control facilitate integration into any stereo music or multi-channel home theater system. Low-Distortion Aluminum-Cone Driver Advanced Servo Control Precision Low-Pass Crossover Filters Crossover-Bypass LFE Input and Daisy-Chain Output Advanced Proprietary Vojtko™ Switching Amplifier - can produce a true 250 watts continuously and 350 watts peak. Energy Transfer Coupler Spikes
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