SPK 8

The SPK 8 is an impressive 8" (20cm) subwoofer from Audiocontrol. With a design that offers high excursion for ultra-deep bass, a fiber matrix paper cone with mica coating, and a 3-layer high-temperature voice coil former, this subwoofer stands out. Additionally, it features a dual damping system for linear bass reproduction and a dual dust cap system to control cabinet compression. Furthermore, it includes an efficient high-performance motor design and the ability to remove the subwoofer grille. All these features make the SPK 8 a remarkable piece of audio quality and control.

Features

• 8" (20cm) Subwoofer
• Design with high excursion for ultra-deep bass
• Fiber matrix paper cone with mica coating
• 3-layer high-temperature coil carrier
• Dual damping system for linear bass reproduction
• Double dust cap system for controlling housing compression
• Efficient High-Performance Engine Design
• Removable subwoofer grille included in delivery

Technical Data

• Load capacity RMS 300 Watts
• Load capacity MAX 600 Watts
• Nominal impedance (Z) 2 Ohm / 4 Ohm
• Direct current resistance (Re) ]] 3.2 Ohm
• Resonant frequency (Fs) 60.3665 Hz
• Piston area (Sd) 0.0194 m2
• Power 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 displacement (Xmax) . 8.5 mm
• Acoustic Volume Comp (Vas) 3.9378 L
• Reference Efficiency (NO.) 0.0952%
• RMS power (Pe) 350 watts
• Frequency response 30-500 Hz
• Winding coil diameter 50.8 mm
• Displacement 1.44Ltr

Dimensions

• Overall dimensions: 214 mm 
• Cutout diameter: 184 mm
• Installation depth: 109 mm
• Mounting height (without grid): 14 mm
• Mounting height (with grid): 30 mm
• Motor diameter (with cover): 141 mm

Bass reflex enclosure recommendation

• External dimensions: 584mm W × 292mm H × 304mm D
• Internal net volume: 25.2L
• Internal total volume: 34.54L
• External gross volume: 52.1L
• Material thickness: 21mm
• Sampling frequency: 40 Hz
• Port dimensions: 44.5mm × 254mm 
• Length of the connection: 711mm
• F3 (Hz): 34

Closed housing

• External dimensions: 368mm W × 254mm H × 254mm D
• Internal net volume: 13.8L
• Internal total volume: 15.29L
• External gross volume: 23.7L
• Material thickness: 21mm
• F3 (Hz): 69.04
• Qtc: 0.86

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