Martin Logan Grotto Triple 15" Subwoofer Black EVO300 Tube Preamplifier it is designed for extreme

it is designed for extreme performance

and authentic

<160Ω balanced

amplifying your music and delivering a more immersive and realistic listening experience

Best of all

Martin Logan Grotto Triple 15" Subwoofer Black EVO300 Tube Preamplifier it is designed for extremeThe MartinLogan Grotto 15 is a triple 15 inch sealed hybrid woofer system driven by 2,000 watts of amplification. Its elegant enclosure conceals raw, room commanding bass performance, with ARC room correction, wireless audio, and app control ensuring perfection in any acoustical environment. Triple 15" sealed hybrid woofer system for extraordinary output and extension 2,000 watt amplifier for thunderous, controlled low frequency authority ARC room