GB SERIES
SUBWOOFERS
GB12D4 12″ (300 MM) AUDIOPHILE GRADE AUTOMOTIVE SUBWOOFER
GB12D4 12″ (300 MM) (2-Ohm or 8-Ohm) AUDIOPHILE GRADE AUTOMOTIVE SUBWOOFER
GB12D4 12″ (300 MM) (2-Ohm or 8-Ohm) AUDIOPHILE GRADE AUTOMOTIVE SUBWOOFER
GB12D4 12″ (300 MM) (2-Ohm or 8-Ohm) AUDIOPHILE GRADE AUTOMOTIVE SUBWOOFER
GB12D4 12″ (300 MM) (2-Ohm or 8-Ohm) AUDIOPHILE GRADE AUTOMOTIVE SUBWOOFER
Overview
GB Series subwoofers are designed for high power handling and optimized to provide superior low frequency extension from a wide range of sealed and vented enclosures.
A copper inductance-reducing pole piece cap also reduces distortion and extends the range of flat response well into the mid-bass.
The GB12D4 includes a vented, cast aluminium basket, dual 4-ohm voice coils
and a convenient switch to select a 2-ohm or 8-ohm configuration.
Features
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Treated Paper Cone
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3” (75 mm) Voice Coil on Fiberglass Former
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Dual 4 Ω Voice Coils
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Impedance Selection Switch
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Copper Inductance- and Distortion-Reducing Pole Piece Cap
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Extended Pole Piece
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Flared Pole Piece Vent
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Dual Ferrite Magnets
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Machined Back Plate
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Proprietary Vented Cast Aluminum Basket
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Tinsel Leads Stitched to the Spider
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Flat, Progressive Nomex® Spider
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Nitrile Butadiene Rubber Surround
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Screw Terminals
Technical Details
Specifications:
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Nominal Impedance: 2 or 8 ohms
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RMS Power Handling: 500 W
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Peak Power Handling: 1500 W
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Frequency Response (-3 dB): 22 Hz – 180 kHz
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Sensitivity (2.83 V/1 M): 92 dB (2 Ω configuration)
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Recommended Amplifier Power Range: 100 W – 1000 W
Dimensions:
ENCLOSURE PERFORMANCE (SEE OWNER’S MANUAL FOR DETAILS):
Sealed Enclosure Volume: 28.3 liters (1 ft³):
Vented Enclosure Volume and Tuning: 42.5 liters (1.5 ft³), 33 Hz:
Thiele & Small Parameters:
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Revc: 2 Ω or 8Ω
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Levc@1kHz: 0.58 mH (1 Ω configuration)
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Sd: 510.7 cm2
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Mmd: 177 g
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Mms: 184 g
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Cms: 171 µM/N
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Vas: 63.7 liters
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Fs: 28.4 Hz
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BL: 11.47 TM (1Ω configuration)
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Qms: 8.82
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Qes: 0.52
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Qts: 0.49
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Xmax (1-way linear): 19 mm (11/16”)
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Basket Displacement: 4.17 liters (0.147 ft3)