{"product_id":"martinlogan-depth-215-subwoofer","title":"MartinLogan Depth 215 Subwoofer","description":"\u003ch1\u003eDepth 215 Subwoofer\u003c\/h1\u003e\n\u003cp\u003eDepth 215 is MartinLogan's flagship subwoofer and the fullest expression of the company's bass engineering. Two active 15-inch Carbon Aerocore woofers sit in a force-cancelling BalancedForce layout, driven by dual Class-D amplifiers totalling 4,400W dynamic peak (2,200W RMS) and governed by a 64-bit Vojtko DSP engine. The result is enormous, effortless output with vanishingly low distortion, equally at home in a reference two-channel system or a dedicated home cinema.\u003c\/p\u003e\n\u003ch2\u003eBalancedForce Woofer System\u003c\/h2\u003e\n\u003cp\u003eThe two 15-inch woofers are mounted in exact opposition, so their equal and opposite forces cancel instead of being passed into the cabinet. With cabinet resonance effectively removed, bass stays tight and articulate at any volume and blends seamlessly with high-end main speakers.\u003c\/p\u003e\n\u003ch2\u003eCarbon Aerocore Woofers\u003c\/h2\u003e\n\u003cp\u003eEach cone is a tri-layer construction: a carbon-fibre outer skin, a rigid, ultra-light PMI foam core and a fibreglass backing. The cone is extremely stiff yet nimble, suppressing resonance and ringing. Triple venting and dual copper shorting rings push distortion lower still.\u003c\/p\u003e\n\u003ch2\u003eConcealed, Convection-Cooled Amplifier\u003c\/h2\u003e\n\u003cp\u003eThe amplifiers are completely hidden. The extruded aluminium trim on the rear edges doubles as heatsinks, drawing in cool air and exhausting heat, while the inputs sit discreetly along the bottom rear edge for neat cable management.\u003c\/p\u003e\n\u003ch2\u003e64-bit Vojtko DSP and ARC Genesis\u003c\/h2\u003e\n\u003cp\u003eA 500MHz, 64-bit DSP controls every aspect of performance in real time and supports Anthem Room Correction (ARC Genesis). A premium ARC calibration microphone, stand and cables are included, and calibration takes only a few minutes on a PC or Mac.\u003c\/p\u003e\n\u003ch2\u003eVault-Like Cabinet\u003c\/h2\u003e\n\u003cp\u003eVariable-thickness walls from 1 to 3 inches, reinforced woofer baffles and a central dividing wall create an exceptionally inert enclosure. Integrated anti-vibration feet minimise energy transfer into the floor (carpet spikes included), cutting rattles and noise in adjoining rooms.\u003c\/p\u003e\n\u003ch2\u003eConnectivity, Wireless and Control\u003c\/h2\u003e\n\u003cp\u003eInputs include XLR (stereo or LFE), RCA stereo and LFE, and speaker-level, plus an RCA sub output for chaining additional subwoofers. A wireless receiver is built in and a wireless transmitter is included. Adjust settings from your listening seat with the MartinLogan Subwoofer Control app for iOS and Android, or use the concealed Touch Control Interface behind the backlit front logo, whose colour is selectable or can be switched off.\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-depth215-specs { width:100%; border-collapse:collapse; border:none; font-size:0.95em; }\n#ml-depth215-specs td { padding:10px 14px; border:none; vertical-align:top; }\n#ml-depth215-specs tr:nth-child(odd) td { background-color:#ffffff; }\n#ml-depth215-specs tr:nth-child(even) td { background-color:#d0d0d0; }\n#ml-depth215-specs td:first-child { font-weight:600; width:35%; }\n\u003c\/style\u003e\n\u003ctable id=\"ml-depth215-specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrequency Response\u003c\/td\u003e\n\u003ctd\u003e18–120 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\u003eDual active 15\" cast-aluminium basket, high-excursion Carbon Aerocore cone woofers in a BalancedForce configuration, with under-spider, voice coil and pole piece venting, plus dual copper shorting rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAmplifier\u003c\/td\u003e\n\u003ctd\u003eDual reference-grade Class-D amplifiers: 4,400W dynamic peak (2,200W RMS)\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\u003eExtensively braced and reinforced variable-thickness (1–3\") cabinet\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: Left, Right or LFE (Right In)\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 (outputs the sum of all connected inputs)\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 (Touch Control Interface)\u003c\/td\u003e\n\u003ctd\u003eLevel, Tone Sweep, Low Pass Filter, Phase\/Polarity, Listening Mode, 20–30Hz Level, ARC On\/Off, Wireless On\/Off, Passcode Lock, Logo Colour, Information, Factory Reset, Language Selection\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\u003e57.2 × 58 × 59.5 cm (22.5\" × 22.8\" × 23.4\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e78.5 kg (173 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":67826525601886,"sku":"DEPTH215","price":164990.0,"currency_code":"ZAR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2577\/1494\/files\/depth-215-hero-1.png?v=1792659567","url":"https:\/\/www.ultrasound.co.za\/products\/martinlogan-depth-215-subwoofer","provider":"Ultra Sound \u0026 Vision","version":"1.0","type":"link"}