{"product_id":"lowersubstitute-e6187","title":"Rockville VS12K54 12\" K5 1400w Car Subwoofer in Vented Sub Enclosure Box - 4 Ohm","description":"\u003cp style=\"text-align: center;\"\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cfont size=\"5\"\u003e\u003cstrong\u003e\u003cstrong style=\"text-align: center; color: rgb(31, 73, 125); font-family: Arial, sans-serif;\"\u003e\u003cstrong style=\"font-family: Arial;\"\u003e\u003cspan style=\"font-size: 24px;\"\u003e\u003cimg src=\"https:\/\/smhttp-ssl-33159.nexcesscdn.net\/uploads\/Miscellanious\/rockville%20logo%20small.jpg\" style=\"text-align: center;\"\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/font\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cstrong\u003e\u003cspan style=\"font-size: 24px; font-family: Arial;\"\u003eVideo of K5 Series UPDATED:\u003c\/span\u003e\u003c\/strong\u003e\n\u003ccenter\u003e\n\u003cdiv class=\"videoframe\"\u003e\n\u003cvideo controls=\"controls\" preload=\"none\" src=\"https:\/\/player.vimeo.com\/progressive_redirect\/playback\/695026012\/rendition\/1080p?loc=external\u0026amp;signature=a121689e160c6066dfdb6d240fc87175b5a8dc7751fe85186c931b06d0fe3bda\" poster=\"https:\/\/smhttp-ssl-33159.nexcesscdn.net\/Assets\/thumbnails\/K5_Series.jpg\" width=\"640\" height=\"360\"\u003e\u003c\/video\u003e\n\u003c\/div\u003e\n\u003c\/center\u003e\n\u003cp\u003e\n\u003c\/p\u003e\u003cp\u003e\n\u003cbr\u003e\n\u003c\/p\u003e\u003cp\u003e\u003cfont size=\"5\"\u003e\u003cspan style=\"font-family: Arial; color: rgb(0, 0, 0);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eFeatures:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/font\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eRockville VS12K54 Single 12\" K5 1400w Car Subwoofer Pre-loaded In Vented Sub Enclosure\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003ePeak Power Handling: 1400 Watts\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eProgram Power Handling: 700 Watts\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eCEA Rated RMS Power Handling: 350 Watts\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eFinal Impedance: 4 Ohm\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e¾” MDF enclosure\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eBonded stapled and braced\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eComputer designed vents\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eAngled at 15 % for perfect bass alignment\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh quality aviation grade tweed carpet\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eSatin Nickel speaker wire push terminals\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eEnclosure air space is 1.52 Cu Ft per sub\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eVent dimensions (inches): 2.25\" x 7\" x 8.5\"\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eTuning frequency of enclosure: 35 Hz\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e2\" 4-Layer Black Aluminum Voice Coils Wound with OFC (100% Copper) Wire\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eThe wire we use to wind the voice coil is imported from Japan which is way better quality than the standard China wire\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e50 Oz High Quality Magnet\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eCast Iron Basket With Black Sanded Finish\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eFiber Reinforced Ultra Stiff Black Non-Pressed Paper Cone – This cone is very efficient which makes the speaker sound louder even without requiring a lot of power to push it\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eThick Foam Surround Provides Incredible Sound Quality With Minimal Distortion\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eBlue Stitching Cone Reinforcement Ensures Long Life\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003ePolypropylene Dustcap\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eGold-Plated spring loaded push terminals\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eImpedance: Single 4-Ohm Voice Coils\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eVented Hole on T-yoke Enhances Heat Dissipation\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMounting Gasket with Rockville branding makes it easy to mount the subwoofer air-tight\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh BL Magnetic Motor Gap\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eHigh grade black glue that handles extremely high temperatures which allows our woofer to handle even more power\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eCutout Diameter: 11.02” inches\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMounting Depth: 5.03” inches\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eFrequency Response: 25 Hz - 1.5K kHz\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003e6mm T-Yoke + 6mm Washer\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eSensitivity: 88dB\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eWeight: 10.1 Lbs.\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eLoaded enclosure weight: 37.4 Lbs.\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eLoaded enclosure dimensions (inches): 18.25” x 14.25” x 16.25”\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cfont size=\"5\"\u003e\u003cspan style=\"font-family: Arial; color: rgb(0, 0, 0);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eDetailed Info:\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/font\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eBody: Non-Pressed Paper\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eGap Plate Inside Diameter: 80mm (3.14 inches)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eGap Plate Outside Diameter: 156mm (6.14 inches)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eGap Plate Thickness: 25mm (0.98 inches)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eYoke Outside Diameter: 145mm (5.7 inches)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eYoke Thickness: 6mm (0.23 inches)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eYoke Pole Diameter: 50mm (2 inches)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cfont size=\"5\"\u003e\u003cspan style=\"font-family: Arial; color: rgb(0, 0, 0);\"\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 24px;\"\u003eT\/S Parameters (Tested on a Klippel):\u003c\/span\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/font\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong\u003eElectrical Parameters\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eElectrical voice coil resistance at DC: Re 3.31 Ohm\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eRequency independent part of voice coil inductance: Le 0.944 mH\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003ePara-inductance of voice coil: L2 1.468 mH\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eElectrical resistance due to eddy current losses: R2 14.7 Ohm\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eElectrical capacitance representing moving mass: Cmes 871.67 µF\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eElectrical inductance representing driver compliance: Lces 20.9 mH\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eResistance due to mechanical losses: Res 31.48 Ohm\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eDriver resonance frequency: fs 37.3 Hz\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong\u003eMechanical Parameters\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong\u003eUsing laser\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical mass of driver diaphragm assembly including air load and voice coil: Mms 130.02 g\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical mass of voice coil and diaphragm without air load: Mmd (Sd) 117.731 g\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical resistance of total-driver losses: Rms 4.738 kg\/s\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical compliance of driver suspension: Cms 0.14 mm\/N\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical stiffness of driver suspension: Kms 7.14 N\/mm\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eForce factor (Bl product): Bl 12.213 N\/A\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eSuspension creep factor: Lambda s 0.028\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong\u003eLoss factors\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eTotal Q-factor considering all losses: Qtp 0.612\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eMechanical Q-factor of driver in free air considering Rms only: Qms 6.429\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eElectrical Q-factor of driver in free air considering Re only: Qes 0.675\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eTotal Q-factor considering Re and Rms only: Qts 0.611\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan style=\"font-family: Arial;\"\u003e\u003cstrong\u003eOther Parameters\u003cbr\u003e\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eEquivalent air volume of suspension: Vas 47.7813 (1)\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eReference efficiency (2 pi-radiation using Re): n0 0.353 %\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eHaracteristic sound pressure level (SPL at 1m for 1W @ Re): Lm 87.67 dB\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eNominal sensitivity (SPL at 1m for 1W @ Zn): Lnom 88.5 dB\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eRoot-mean-square fitting error of driver impedance Z(f): rmse Z 3.94 %\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eRoot-mean-square fitting error of transfer function Hx (f): rmse Hx 2.2 %\u003c\/span\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cspan style=\"font-family: Arial;\"\u003eDiaphragm area: Sd 490.87 cm2\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rockville","offers":[{"title":"Default Title","offer_id":47705357943085,"sku":"VS12K54","price":99.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/0805\/3037\/products\/023c91b0-f8fd-4c88-8980-a3cd9eba5472.jpg?v=1702590606","url":"https:\/\/audiosavings.com\/products\/lowersubstitute-e6187","provider":"Audio Savings","version":"1.0","type":"link"}