{"product_id":"martinlogan-grotto-12-subwoofer","title":"MartinLogan Grotto 12 Subwoofer","description":"\u003ch1\u003eGrotto 12 Subwoofer\u003c\/h1\u003e\n\u003cp\u003eGrotto 12 delivers deep, controlled bass from an elegantly understated cabinet. With larger drivers and more power than the Abyss 8 and 10, its Hybrid Woofer System pairs an active 12-inch aluminium-cone woofer with dual 12-inch passive radiators, driven by a 2,000W peak (1,000W RMS) Magnitude MT-2kW amplifier and a 64-bit Vojtko DSP engine. Wired and built-in wireless connections, app control and ARC Genesis room correction support round it out.\u003c\/p\u003e\n\u003ch2\u003eBold Performance, Subtle Styling\u003c\/h2\u003e\n\u003cp\u003eThree full-face grilles conceal Grotto 12's capabilities, letting it sit quietly in almost any interior until the music or movie calls for authoritative bass.\u003c\/p\u003e\n\u003ch2\u003e12\" Hybrid Woofer System\u003c\/h2\u003e\n\u003cp\u003eEngineered with Klippel analysis for dynamic output and low distortion, the active 12-inch woofer is matched by two identical 12-inch passive radiators, combining the low-frequency extension of a ported design with the compact size and tighter bass of a sealed one. Aluminium cones, cast-aluminium baskets and large motors ensure fast response and reliability.\u003c\/p\u003e\n\u003ch2\u003eMagnitude MT-2kW Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe proprietary Class-D Magnitude amplifier provides up to 2,000W peak (1,000W RMS) of clean, low-distortion power with precise control during the most demanding passages.\u003c\/p\u003e\n\u003ch2\u003eVojtko DSP and ARC Genesis\u003c\/h2\u003e\n\u003cp\u003eA 500MHz, 64-bit DSP controls performance in real time and supports Anthem Room Correction (ARC Genesis), with calibration in minutes using the optional ARC Calibration Kit (sold separately).\u003c\/p\u003e\n\u003ch2\u003eSolid Construction and Anti-Vibration Feet\u003c\/h2\u003e\n\u003cp\u003eThe sealed 1-inch MDF cabinet features reinforced woofer baffles and a large central brace. Integrated anti-vibration feet (carpet spikes included) reduce rattles and vibration transfer into adjoining rooms.\u003c\/p\u003e\n\u003ch2\u003eConnectivity and Control\u003c\/h2\u003e\n\u003cp\u003eXLR LFE, RCA stereo and LFE, speaker-level inputs and an RCA sub output, plus a built-in wireless receiver with transmitter included. Adjust every setting from your seat with the MartinLogan Subwoofer Control app.\u003c\/p\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003cp\u003e\u003cem\u003eSpecifications are subject to change without notice.\u003c\/em\u003e\u003c\/p\u003e\n\u003cstyle\u003e\n#ml-grotto12-specs { width:100%; border-collapse:collapse; border:none; font-size:0.95em; }\n#ml-grotto12-specs td { padding:10px 14px; border:none; vertical-align:top; }\n#ml-grotto12-specs tr:nth-child(odd) td { background-color:#ffffff; }\n#ml-grotto12-specs tr:nth-child(even) td { background-color:#d0d0d0; }\n#ml-grotto12-specs td:first-child { font-weight:600; width:35%; }\n\u003c\/style\u003e\n\u003ctable id=\"ml-grotto12-specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e22–120 Hz ±3 dB (anechoic, via LFE input)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLow Frequency Transducer\u003c\/td\u003e\n\u003ctd\u003eTriple 12\" Hybrid Woofer System: 1× high-excursion aluminium cone in a cast-aluminium basket, plus 2× aluminium cone passive radiators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier\u003c\/td\u003e\n\u003ctd\u003eMartinLogan Magnitude MT-2kW: 2,000W peak (1,000W continuous)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDigital Signal Processing\u003c\/td\u003e\n\u003ctd\u003eUltra high-resolution 500MHz Vojtko DSP engine with 64-bit processing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCabinet\u003c\/td\u003e\n\u003ctd\u003eSealed 1\" MDF cabinet with centre brace and reinforced woofer baffles\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInputs\u003c\/td\u003e\n\u003ctd\u003eLine level: Left, Right and LFE (RCA)\u003cbr\u003eXLR: LFE\u003cbr\u003eSpeaker level: Left and Right (requires banana plugs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutput\u003c\/td\u003e\n\u003ctd\u003eRCA Sub Out (combines and repeats all incoming signals)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWireless\u003c\/td\u003e\n\u003ctd\u003eIntegrated wireless receiver, wireless transmitter included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControls (Backplate)\u003c\/td\u003e\n\u003ctd\u003eLevel: LED backlit knob\u003cbr\u003eTone Sweep: start\/pause with status light\u003cbr\u003ePower Mode: On, 12V Trigger, Auto\u003cbr\u003eWireless pairing button\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControls (via Bluetooth app)\u003c\/td\u003e\n\u003ctd\u003eLevel: −40 to +12dB\u003cbr\u003eLow-Pass Filter: 35–120Hz (1Hz steps); Bypass, Third or Fourth order\u003cbr\u003ePhase: 0–180° (1° steps); Polarity: Normal, Inverted\u003cbr\u003eListening Modes: Movie, Music, Night\u003cbr\u003e20–30Hz Level: ±10dB\u003cbr\u003eARC Genesis: On\/Off\u003cbr\u003eTone Sweep (120–20Hz)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Draw\u003c\/td\u003e\n\u003ctd\u003eMax: 1000W\u003cbr\u003eStandby (wireless disabled): 0.5W\u003cbr\u003eStandby (wireless enabled): \u0026lt;2W (transmitter and subwoofer combined)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFeet\u003c\/td\u003e\n\u003ctd\u003eIntegrated anti-vibration feet (carpet spikes included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions (H × W × D)\u003c\/td\u003e\n\u003ctd\u003e45.2 × 45.4 × 45.4 cm (17.8\" × 17.9\" × 17.9\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e37.4 kg (82.5 lbs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eGloss Black\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSold As\u003c\/td\u003e\n\u003ctd\u003eEach\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e","brand":"MartinLogan","offers":[{"title":"Gloss Black","offer_id":67826533072990,"sku":"GRO12","price":56990.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/1494\/files\/grotto12-product-page-hero1.jpg?v=1792659708","url":"https:\/\/www.ultrasound.co.za\/products\/martinlogan-grotto-12-subwoofer","provider":"Ultra Sound \u0026 Vision","version":"1.0","type":"link"}