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
• equivalent volume of compliance Vas = 43 l
• total Q factor Qts = 0,48 (Qms=5,62, Qes=0,52)
• voice coil diameter = 75,6 mm
• mounting diameter d = 302,5 mm
• overall diameter d = 346,2 mm
• mounting depth (not countersunk) t = 146,5 mm