Product information "SB Acoustics SB34SWPL75-3-DV"
The SB Acoustics SB34SWPL75-3-DV 12" woofer uses a large 3" voice coil on a cast aluminium chassis. Hard Paper proprietary cone materials made in-house for consistency. Low damping SBR rubber surround with high exertion and resilience. Open structure cast frame for reduced reflections and compression. Aluminium alloy for light weight, non-magnetic and extra rigidity.
Features:
Hard paper cone for improved piston operation (made in-house)
Vented pole piece for minimum compression
Vented cast aluminum chassis for optimum strength and low compression
3 copper voice coil (4-layer) for improved power handling
Long life silver lead wires
Low damping medium hardness rubber surround for improved linearity and power handling
Non-conducting fiber glass voice coil former for minimum damping
Specifications
power handling (continuous/programme) = 300 W
resonance frequency fs = 27,5 Hz
impedance R = 2x3 Ohm
sound pressure level SPL = 90/85 dB (2,83V; 1m)
DC resistance Re = 2x2,5 Ohm
force factor BL = 9,7/19,5 N/A
voice coil inductance L = 1,4/6,1 mH
effective piston radiating area Sd = 458 cm2
effective mechanical mass incl. air load mms = 231 g
