6.5″ B&C FHX51

General

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Frequency Range: 85 Hz – 18000 Hz
Dispersion Angle: 70 °

Specifications LF Unit

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 6.5 Ω
Nominal Power Handling: 150 W
Continuous Power Handling: 300 W
Sensitivity: 93 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: 1.05 T
Woofer Cone Treatment: WP Waterproof Front Side

Specifications HF Unit

Nominal Diameter: 170 mm (6.5 in)
Nominal Impedance: 8 Ω
Minimum Impedance: 7 Ω
Nominal Power Handling: 10 W
Continuous Power Handling: 20 W
Sensitivity: 108.5 dB
Recommended Crossover: 2.5 kHz
Voice Coil Diameter: 25 mm (1 in)
Winding Material: Aluminium
Inductance: 0.1 mH
Flux Density: 1.65 T
Diaphragm Material: Polyester

Design

Magnet Material: Ferrite (LF) – Neodym. Ring (HF)
Woofer Cone Treatment: WP Waterproof Front Side

Parameters

Fs: 85 Hz
Re: 5.5 Ω
Qes: 0.4
Qms: 7.8
Qts: 0.37
Vas: 5 dm³ (0.18 ft³)
Sd: 132 cm² (20.5 in²)
η₀: 0.83 %
Xvar: 5.7 mm
Mms: 16 g
Bl: 11.3 Tm
Le: 1 mH
EBP: 213 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: 122 mm (4.8 in)
Flange and Gasket Thickness: 12 mm (0.47 in)
Net Weight: 2.6 kg (5.73 lb)
Shipping Units: 1 pcs
Shipping Weight: 3.05 kg (6.72 lb)
Shipping Box: 255x255x150 mm (10.04×10.04×5.91 in)

Service Kit

hf Replacement Diaphragm: MMDDE

Specification PDF