Subwoofer 2×18"

Black Spider Alpha 218

A dual 18-inch sub with copper 4-inch voice coils, 25Hz–1kHz response and remarkable linearity for low-distortion, high-power bass.

Ideal for: Concerts · Churches · Outdoor · Crusades

Details

Full specifications

A double 18-inch subwoofer for medium-to-large sound systems, known for its linearity and suited to high-power, low-distortion subs in concert.

Power handling: 2000W AES / 4000W continuous program
Nominal diameter: dual 18-inch / 460mm
Voice coil: 4-inch (100mm) inside/outside copper on fibreglass former
Frequency range: 25Hz – 1000Hz
Sensitivity (1W, 1m): 97.5dB
Impedance: 8Ω
Maximum excursion (peak to peak): 50mm
Magnet: ferrite · Weight: 13.3kg per driver
Triple-roll surround with fibre-loaded corrugated straight cone
Curved T-pole with 14mm top plate and forced-air ventilation for reduced power compression
Dimensions: 465mm overall diameter · 424mm baffle hole · 228mm depth
Thiele-Small: Fs 29Hz · Re 5.5Ω · Qms 7.7 · Qes 0.29 · Qts 0.28 · BL 24.5 T·m · effective piston diameter 395mm
Loud enough for crowds of 1000–2000 people · pairs with 5000–7000W amplifiers