12″ B&C Midbass GNDA44

Specifications

Nominal Diameter: 320 mm (12 in)
Minimum Impedance: 14 Ω
Continuous Power Handling: 240 W
Frequency Range: 90 Hz – 5500 Hz
Winding Material: Copper
Winding Depth: 9 mm (0.35 in)
Flux Density: 1.35 T
Nominal Impedance: 16 Ω
Nominal Power Handling: 120 W
Sensitivity: 98 dB
Voice Coil Diameter: 44 mm (1.7 in)
Former Material: Paper
Magnetic Gap Depth: 6 mm (0.24 in)
Woofer Cone Treatment: None

Parameters

Fs: 88 Hz
Qes: 0.81
Qts: 0.78
Sd: 522 cm² (80.91 in²)
Xmax: 3 mm
Bl: 16.8 Tm
EBP: 109 Hz
Re: 12.6 Ω
Qms: 18.4
Vas: 38 dm³ (1.34 ft³)
η₀: 3.1%
Mms: 33 g
Le: 1.3 mH

Design

Surround Shape: Accordion
Magnet Material: Neodymium Inside Slug
Pole Design: Straight Pole
Cone Shape: Exponential
Spider: Single
Woofer Cone Treatment: None

Mounting and Shipping Info

Overall Diameter: 311 mm (12.24 in)
Baffle Cutout Diameter: 281 mm (11.06 in)
Flange and Gasket Thickness: 9 mm (0.37 in)
Net Weight: 1.4 kg (3.09 lb)
Shipping Weight: 2.3 kg (5.07 lb)
Bolt Circle Diameter: 296 mm (11.6 in)
Depth: 125 mm (4.92 in)
Air Volume Occupied by Driver: 2.5 dm³ (0.09 ft³)
Shipping Units: 1 pcs
Shipping Box: 360x360x200 mm (14.17×14.17×7.87 in)

Service Kit

Recone Kit: RCK12GNDA4416
Cone
Gasket
Centering Shims

Specification PDF