{"product_id":"spk-8s4","title":"SPK-8S4","description":"\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHigh Excursion Design for Ultra Low Bass\u003c\/li\u003e\n\u003cli\u003eFiber Matrix Paper Cone with Mica Coating\u003c\/li\u003e\n\u003cli\u003e3-Layer High Temp Voice Coil Former\u003c\/li\u003e\n\u003cli\u003eDual Damping System for Linear Bass Reproduction\u003c\/li\u003e\n\u003cli\u003eDual Dust Cap System for Enclosure Compression Control\u003c\/li\u003e\n\u003cli\u003eEfficient Heavy-Duty Motor Design\u003c\/li\u003e\n\u003cli\u003eRemovable Subwoofer Grille Included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSmall parameters\u003c\/h3\u003e\u003cp\u003eNominal Impedance (Z)                4 ohms\u003c\/p\u003e\u003cp\u003eDC Resistance (Re) ]]                     3.2 ohms\u003c\/p\u003e\u003cp\u003eResonance Frequency (Fs)           60.3665 Hz\u003c\/p\u003e\u003cp\u003ePiston Area (Sd)                              0.0194 m2\u003c\/p\u003e\u003cp\u003eForce Factor (BL)                           11.3310 T.m\u003c\/p\u003e\u003cp\u003eMechanical Q Factor (Qms)         5.4933\u003c\/p\u003e\u003cp\u003eElectrical Q Factor (Qes)              0.8733\u003c\/p\u003e\u003cp\u003eTotal Q Factor (Qts)                       0.7535\u003c\/p\u003e\u003cp\u003eSensitivity 1W\/M (SPL)                  81.9876\u003c\/p\u003e\u003cp\u003eMechanical Comp (Cms)               0.0752 mm\/N\u003c\/p\u003e\u003cp\u003eMoving Mass (Mms)                      92.3784 g\u003c\/p\u003e\u003cp\u003eLinear Excursion (Xmax) .            8.5 mm\u003c\/p\u003e\u003cp\u003eVolume Acoustic Comp (Vas)      3.9378 Ltr\/ 0.1390 Cu ft\u003c\/p\u003e\u003cp\u003eReference Efficiency (NO.)           0.0952%\u003c\/p\u003e\u003cp\u003eRMS Power (Pe)                             350 Watts\u003c\/p\u003e\u003cp\u003eFrequency Response                    30-500 Hz\u003c\/p\u003e\u003cp\u003eVoice Coil Diameter                      2.0 in\/50.8 mm\u003c\/p\u003e\u003cp\u003eDisplacement                                0.05 cu ft\/ 1.44Ltr\u003c\/p\u003e\u003ch3\u003eDimensions\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDimensions: 23.00″ W × 11.50″H × 12.00″D\u003c\/li\u003e\n\u003cli\u003eCut Out Diameter: 7.25 in\/ 184 mm\u003c\/li\u003e\n\u003cli\u003eMounting Depth: 4.291in\/ 109 mm\u003c\/li\u003e\n\u003cli\u003eMounting Height (w\/o Grille):  0.55in \/ 14mm\u003c\/li\u003e\n\u003cli\u003eMounting Height (w\/ Grille):  1.18in \/ 30mm\u003c\/li\u003e\n\u003cli\u003eMotor Diameter (w\/ Cover):  5.55in \/ 141mm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePorted enclosure\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExternal Dimensions:  23.00″ W × 11.50″H × 12.00″D\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume:  0.89 ft3\u003c\/li\u003e\n\u003cli\u003eTotal Internal Volume:  1.22 ft3\u003c\/li\u003e\n\u003cli\u003eGross External Volume:  1.84 ft3\u003c\/li\u003e\n\u003cli\u003eMaterial Thickness: 0.75″\u003c\/li\u003e\n\u003cli\u003eTuning Frequency: 40 Hz\u003c\/li\u003e\n\u003cli\u003ePort Area” 17.50 inch2\u003c\/li\u003e\n\u003cli\u003ePort Inlet:  1.75″W× 10.00″H\u003c\/li\u003e\n\u003cli\u003ePort Length:  28.00″\u003c\/li\u003e\n\u003cli\u003eF3 (Hz):  34\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSealed enclosure\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eExternal Dimensions: 14.50″ W × 10.00″H × 10.00″D\u003c\/li\u003e\n\u003cli\u003eNet Internal Volume:  0.49 ft3\u003c\/li\u003e\n\u003cli\u003eTotal Internal Volume: 0.54 ft3\u003c\/li\u003e\n\u003cli\u003eGross External Volume: 0.84 ft3\u003c\/li\u003e\n\u003cli\u003eMaterial Thickness: 0.75″\u003c\/li\u003e\n\u003cli\u003eF3 (Hz): 69.04\u003c\/li\u003e\n\u003cli\u003eQtc:  0.86\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e*Enclosure size recommendations do not include driver and\/or port displacement\u003c\/p\u003e\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Audio Control","offers":[{"title":"Default Title","offer_id":47218876154005,"sku":"210000004140","price":199.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0774\/3815\/6949\/files\/4449970465.jpg?v=1774990175","url":"https:\/\/slanginsound.com\/products\/spk-8s4","provider":"Slangin Sound and Tint","version":"1.0","type":"link"}