6.5″ B&C HCX51

General

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Frequency Range: 90 Hz – 18000 Hz
Dispersion Angle: 70 °

Specifications LF Unit

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 6 Ω
Nominal Power Handling: 150 W
Continuous Power Handling: 300 W
Sensitivity: 92 dB
Voice Coil Diameter: 51 mm (2 in)
Winding Material: Copper
Former Material: Kapton
Winding Depth: 13 mm (0.51 in)
Magnetic Gap Depth: 6 mm (0.24 in)
Flux Density: 1.1 T
Woofer Cone Treatment: TWP Waterproof Both Sides

Specifications HF Unit

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 7.5 Ω
Nominal Power Handling: 25 W
Continuous Power Handling: 50 W
Sensitivity: 105 dB
Recommended Crossover: 2.2 kHz
Voice Coil Diameter: 36 mm (1.4 in)
Winding Material: Aluminium
Inductance: 0.06 mH
Flux Density: 1.8 T
Diaphragm Material: Polyester

Design

Magnet Material: Neodymium Ring
Woofer Cone Treatment: TWP Waterproof Both Sides

Parameters

Fs: 89 Hz
Re: 5.2 Ω
Qes: 0.4
Qms: 7.5
Qts: 0.38
Vas: 5 dm³ (0.18 ft³)
Sd: 132 cm² (20.5 in²)
η₀: 0.8 %
Xvar: 5.5 mm
Mms: 16 g
Bl: 10.9 Tm
Le: 0.8 mH
EBP: 223 Hz

Mounting and Shipping Info

Overall Diameter: 187 mm (7.4 in)
Bolt Circle Diameter: 172 mm (6.7 in)
Baffle Cutout Diameter: 146 mm (5.75 in)
Depth: 104 mm (4.1 in)
Flange and Gasket Thickness: 11 mm (0.4 in)
Net Weight: 1.6 kg (3.53 lb)
Shipping Units: 1 pcs
Shipping Weight: 2.05 kg (4.52 lb)
Shipping Box: 255x255x150 mm (10.04×10.04×5.91 in)

Service Kit

hf Replacement Diaphragm: MMD0128
lf Recone Kit: RCK06HCX518
Cone
Gasket
Centering Shims

Specification PDF