B&C's 6NDL44 6-1/2" cast frame neodymium woofer is a lightweight, powerful choice for ultra-compact multi-way speaker systems. Its rubber half-roll edge and treated cone are engineered to handle high bass excursions without drama, while still allowing a clean, articulate sonic signature. The 6NDL44 is also suitable as the midrange element in medium efficiency 3-way applications.
Power Handling (RMS)200 Watts
Power Handling (max)400 Watts
Frequency Response70 to 6,000 Hz
Sensitivity91.5 dB 1W/1m
Voice Coil Diameter1.7"
Resonant Frequency (Fs)68 Hz
DC Resistance (Re)5 ohms
Voice Coil Inductance (Le)0.57 mH
Mechanical Q (Qms)9
Electromagnetic Q (Qes)0.35
Total Q (Qts)0.34
Compliance Equivalent Volume (Vas)0.26 ft.³
BL Product (BL)10.3 Tm
Diaphragm Mass Inc. Airload (Mms)17.8g
Maximum Linear Excursion (Xmax)6 mm
Surface Area of Cone (Sd)132 cm²
Materials of Construction
Voice Coil Wire MaterialCopper
Basket / Frame MaterialCast Aluminum
Overall Outside Diameter7.4"
Baffle Cutout Diameter5.7"
Bolt Circle Diameter6.7"
# Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)