Audio Control SPK-8S2 subwoofer

8″ Subwoofer of the SPIKE series. Single, 2-ohm high efficiency.

FEATURES

• High tilt design for ultra-low frequencies

• Mica-reinforced paper fibre membrane

• 3-layer coil casing with high thermal resistance

• Dual damping system for linear bass reproduction

• Double dust cover system for housing pressure control

• Efficient, robust magnetic system

• Removable subwoofer grille included

SPECIFICATIONS/PARAMETERS

• Nominal impedance (Z): 2 ohms
• DC resistance (Re): 1.6 ohms
• Resonant frequency (Fs): 51.6241 Hz
• Piston area (Sd): 0,0194 m²
• Driving force (BL): 9.7018 T-m
• Mechanical Q-factor (Qms): 5,444
• Electric Q factor (Qes): 0,525
• Total Q factor (Qts): 0,4788
• 1W/1M sensitivity (SPL): 83.3836 dB
• Mechanical susceptibility (Cms): 0.0998 mm/N
• Mobile mass (Mms): 95,2145 g
• Linear swing (Xmax): 8.5 mm
• Acoustic compensation volume (Vas): 5.2241 l / 0.1845 ft³
• Reference efficiency (NO.): 0.1314% RMS
• Power (Pe): 350 W
• Frequency response: 30-500 Hz
• Coil diameter: 2.0 inches / 50.8 mm
• Displacement volume: 0.05 ft³ / 1.44 l

DIMENSIONS

• Dimensions: 8.425 inches / 214 mm
• Mounting hole diameter: 7.25 inches / 184 mm
• Mounting depth: 4.291 in / 109 mm
• Mounting height (without bezel): 0.55 in / 14 mm
• Mounting height (with bezel): 1.18 inches / 30 mm
• Motor diameter (with guard): 5.55 in / 141 mm

BASS-REFLEX HOUSING

• External dimensions: 23.00″ (W) × 11.50″ (H) × 12.00″ (D)
• Net internal volume: 0.89 ft³ (cubic feet)
• Total internal volume: 1.22 ft³
• Gross external volume: 1.84 ft³
• Material thickness: 0.75″
• Tuning frequency: 40 Hz
• Port area: 17.50 in²
• Port inlet: 1.75″ (W) × 10.00″ (H)
• Port length: 28,00″
• F3 (Hz): 34

CLOSED CASE

• External dimensions: 14.50″ (W) × 10.00″ (H) × 10.00″ (D)
• Net internal volume: 0.49 ft³ (cubic feet)
• Total internal volume: 0.54 ft³
• Gross external volume: 0.84 ft³
• Material thickness: 0.75″
• F3 (Hz): 69,04
• Qtc: 0,86