SPK-8S4

• High Excursion Design for Ultra Low Bass
• Fiber Matrix Paper Cone with Mica Coating
• 3-Layer High Temp Voice Coil Former
• Dual Damping System for Linear Bass Reproduction
• Dual Dust Cap System for Enclosure Compression Control
• Efficient Heavy-Duty Motor Design
• Removable Subwoofer Grille Included

thiele/small parameters

• Nominal Impedance (Z)                4 ohms
• DC Resistance (Re) ]]                     3.2 ohms
• Resonance Frequency (Fs)           60.3665 Hz
• Piston Area (Sd)                              0.0194 m2
• Force Factor (BL)                           11.3310 T.m
• Mechanical Q Factor (Qms)         5.4933
• Electrical Q Factor (Qes)              0.8733
• Total Q Factor (Qts)                       0.7535
• Sensitivity 1W/M (SPL)                  81.9876
• Mechanical Comp (Cms)               0.0752 mm/N
• Moving Mass (Mms)                      92.3784 g
• Linear Excursion (Xmax) .            8.5 mm
• Volume Acoustic Comp (Vas)      3.9378 Ltr/ 0.1390 Cu ft
• Reference Efficiency (NO.)           0.0952%
• RMS Power (Pe)                             350 Watts
• Frequency Response                    30-500 Hz
• Voice Coil Diameter                      2.0 in/50.8 mm
• Displacement                                0.05 cu ft/ 1.44Ltr

in the box:

• SPK-8S4, Manual, Warranty

dimensions

• Dimensions: 23.00″ W × 11.50″H × 12.00″D
• Cut Out Diameter: 7.25 in/ 184 mm
• Mounting Depth: 4.291in/ 109 mm
• Mounting Height (w/o Grille):  0.55in / 14mm
• Mounting Height (w/ Grille):  1.18in / 30mm
• Motor Diameter (w/ Cover):  5.55in / 141mm

ported enclosure

• External Dimensions:  23.00″ W × 11.50″H × 12.00″D
• Net Internal Volume:  0.89 ft3
• Total Internal Volume:  1.22 ft3
• Gross External Volume:  1.84 ft3
• Material Thickness: 0.75″
• Tuning Frequency: 40 Hz
• Port Area” 17.50 inch2
• Port Inlet:  1.75″W× 10.00″H
• Port Length:  28.00″
• F3 (Hz):  34
•  

sealed enclosure

• External Dimensions: 14.50″ W × 10.00″H × 10.00″D
• Net Internal Volume:  0.49 ft3
• Total Internal Volume: 0.54 ft3
• Gross External Volume: 0.84 ft3
• Material Thickness: 0.75″
• F3 (Hz): 69.04
• Qtc:  0.86

*Enclosure size recommendations do not include driver and/or port displacement

Full Line Catalog

Literature

User Manual

Templates