{"product_id":"martinlogan-grotto-12-powered-subwoofer-black","title":"MartinLogan Grotto 12 Powered Subwoofer - Black","description":"\u003ch1\u003eMartinLogan Grotto 12 Powered Subwoofer\u003c\/h1\u003e\n\u003ch2\u003eWhat You Need to Know\u003c\/h2\u003e\n\u003ch3\u003eMinimalist Styling, Maximum Performance\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 8.0pt;\"\u003eThe original Grotto set the standard for clean, powerful bass in a compact, decor-friendly design. The all-new Grotto 12 carries that legacy forward with serious muscle: a Triple 12-inch Hybrid Woofer System and a 2,000-watt peak amplifier delivering deep, controlled, impactful bass from an elegantly understated cube. Three full-faced grilles conceal its powerful nature—until the first bass note drops.\u003c\/p\u003e\n\u003ch3\u003eThe Triple 12\" Hybrid Woofer System\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 8.0pt;\"\u003eA high-excursion 12-inch aluminum-cone active woofer in a rigid cast-aluminum basket is flanked by dual 12-inch aluminum passive radiators—engineered with Klippel analysis to the same standard as the active driver. The layout delivers the best of both worlds: the extended low-frequency output of a ported design with the compact size and tight, articulate bass of a sealed cabinet, reaching down to 22Hz.\u003c\/p\u003e\n\u003ch3\u003eMassive Power, Precise Control\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 8.0pt;\"\u003eMartinLogan's proprietary Magnitude MT-2kW amplifier supplies up to 2,000 watts peak (1,000W RMS) of ultra-efficient, low-distortion Class D power—concussive impact with effortless musicality. The 500MHz Vojtko DSP engine with 64-bit processing governs everything in real time, enabling app control, built-in wireless, and compatibility with the award-winning Anthem Room Correction system.\u003c\/p\u003e\n\u003ch3\u003eWireless Included, Connections for Everything\u003c\/h3\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 8.0pt;\"\u003eA wireless receiver and transmitter come in the box—lossless, low-latency, with forward error correction. Wired options cover XLR LFE, stereo\/LFE RCA, and speaker-level inputs (so the sub receives the same sonic signature as your amplifier), plus an RCA sub output for chaining multiple subs. Integrated anti-vibration feet (carpet spikes included) keep the bass tight and the neighbors happy. Finished in Gloss Black.\u003c\/p\u003e\n\u003ch2\u003eFeatures \u0026amp; Specifications\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eTriple 12\" Hybrid Woofer System\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eActive aluminum woofer plus dual passive radiators—ported extension, sealed-box control.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eMagnitude MT-2kW Amplifier\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003e2,000W peak \/ 1,000W RMS of clean, low-distortion Class D power.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eVojtko DSP Engine\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003e500MHz, 64-bit processing controls performance in real time with audible transparency.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eWireless Receiver and Transmitter Included\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eLossless, low-latency wireless connection right out of the box.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eApp Control + Anthem Room Correction\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eTune from your seat; calibrate to your room in minutes with ARC (mic kit sold separately).\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eAnti-Vibration Feet\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eReduce floor and wall vibrations for cleaner bass; carpet spikes included.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eType: Sealed Powered Subwoofer with Hybrid Woofer System\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eFrequency Response: 22 - 120Hz ± 3dB (Anechoic via LFE input)\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eWoofer System: Triple 12\" Hybrid — 1 High-Excursion Aluminum Cone (Cast Aluminum Basket) + 2 Passive Radiators\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eAmplifier: Magnitude MT-2kW — 2,000W Peak \/ 1,000W RMS\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eDSP: 500MHz Vojtko Engine, 64-Bit Processing\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eWireless: Integrated Receiver; Wireless Transmitter Included\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eInputs: RCA (L\/R\/LFE), XLR (LFE), Speaker Level (L\/R); Simultaneous Connections Supported\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eOutputs: RCA Sub Out for Multi-Sub Chaining\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eControls: Backplate Knob + App (Level, Low-Pass Filter, Phase, Movie\/Music\/Night Presets, 20-30Hz Level, ARC)\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eCabinet: Sealed 1\"-Thick MDF, Reinforced Baffles, Center Brace\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eFeet: Integrated Anti-Vibration (carpet spikes included)\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eDimensions: 17.8\"H x 17.9\"W x 17.9\"D\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eWeight: 82.5 lbs\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eFinish: Gloss Black\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003eSold By: Each\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eIs the wireless connection really included?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eYes—both the receiver (built in) and the transmitter come in the box, with lossless, low-latency transmission and forward error correction. No wireless kit to buy separately. The subwoofer still needs AC power at its location.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eHow does the Grotto 12 compare to the Abyss Series?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eSame Vojtko DSP, app control, wireless, and ARC compatibility—but the Grotto 12 steps up to larger 12\" drivers and double the power of the Abyss 10 (2,000W vs. 1,600W peak) for bigger rooms and deeper, more effortless output. Need even more? Ask us about the Grotto 15.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eWhat do I need for Anthem Room Correction?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eAn ARC Calibration Kit and a PC or Mac (sold separately). Calibration takes just minutes with ARC Genesis software and dials the bass precisely to your room.\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-top: 6.0pt;\"\u003e\u003cb\u003eWill it work with my non-MartinLogan speakers?\u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"MsoNormal\" style=\"margin-bottom: 6.0pt;\"\u003eAbsolutely. With RCA, XLR, speaker-level, and wireless connections, the Grotto 12 integrates with nearly any system—the speaker-level inputs even let it inherit the sonic signature of your chosen amplifier.\u003c\/p\u003e\n\u003ch2\u003eWhy Audio Advisor?\u003c\/h2\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003e40+ Years of Expertise\u003c\/b\u003e – Helping music lovers build better systems since 1981.\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003e60-Day Money-Back Guarantee\u003c\/b\u003e – Hear it in your own system with confidence.\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eReal Product Experts\u003c\/b\u003e – Friendly advice before and after your purchase.\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eFree Shipping\u003c\/b\u003e – On qualifying orders over $49.\u003c\/p\u003e\n\u003cp class=\"MsoListParagraph\" style=\"text-indent: -18.0pt; mso-list: l0 level1 lfo1; margin: 0mm 0mm 4.0pt 36.0pt;\"\u003e\u003c!-- [if !supportLists]--\u003e\u003cspan style=\"mso-list: Ignore;\"\u003e•\u003cspan style=\"font: 7.0pt 'Times New Roman';\"\u003e       \u003c\/span\u003e\u003c\/span\u003e\u003c!--[endif]--\u003e\u003cb\u003eFlexible Financing\u003c\/b\u003e – Convenient payment options available.\u003c\/p\u003e","brand":"MartinLogan","offers":[{"title":"New","offer_id":45981811900589,"sku":"NEW-MLGROTTO12","price":2299.99,"currency_code":"USD","in_stock":true},{"title":"Demo","offer_id":45981811933357,"sku":"DEMO-MLGROTTO12","price":2299.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0750\/3708\/1773\/files\/MLGROTTO12_03_grill_2026__03634.1770825853.1280.1280_25e42a28-a9a0-45e1-8114-c7cc83de5f4d.jpg?v=1778166165","url":"https:\/\/www.audioadvisor.com\/products\/martinlogan-grotto-12-powered-subwoofer-black","provider":"Audio Advisor","version":"1.0","type":"link"}