4½” High Performance Steel Frame Subwoofer Units. Suitable for dedicated subwoofer applications and as low frequency transducers in 2½-, 3- and multi-way speaker systems.
FEATURES
Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
Large linear stroke, ensuring low distortion at high output levels
Rigid paper cones to ensure piston motion even at high levels - for reduced distortion
Rigid steel chassis’ with extensive venting for lower air flow speed reducing audible distortion
Heavy-duty fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
Large motor structures for better control and power handling
Built-in alu field-stabilizing rings for reduced distortion at high levels
Low-loss suspension (high Qm) for better reproduction of details and dynamics
Black plated motor parts for better heat transfer to the surrounding air
Conex spider for better durability under extreme conditions
Gold plated terminals to ensure long-term trouble free connection
Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing
Specifications
power handling (continuous/programme) = 40 W
frequency range = 50-1500 Hz
resonance frequency fs = 58 Hz
impedance R = 4 Ohm
sound pressure level SPL = 86 dB (2,83V; 1m)
DC resistance Re = 3,2 Ohm
force factor BL = 4,7 N/A
voice coil inductance L = 0,48 mH
effective piston radiating area Sd = 49 cm2
effective mechanical mass incl. air load mms = 7,9 g
equivalent volume of compliance Vas = 3,3 l
total Q factor Qts = 0,39 (Qms=8,4, Qes=0,41)
voice coil diameter = 26 mm
maximum peak linear excursion vibration xlin = +/- 4 mm
