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 midbass.

The GB10D4 includes a vented, cast aluminum basket, dual 4 ohm voice coils and a convenient switch to select a 2 ohm or 8 ohm configuration

• Treated Paper Cone
• 3” (75 mm) Voice Coil on Fiberglass Former
• Dual 4 Ω Voice Coils
• Impedance Selection Switch
• Copper Inductance- and Distortion-Reducing Pole Piece Cap
• Extended Pole Piece
• Flared Pole Piece Vent
• Dual Ferrite Magnets
• Machined Back Plate
• Proprietary Vented Cast Aluminum Basket
• Tinsel Leads Stitched to the Spider
• Flat, Progressive Nomex® Spider
• Nitrile Butadiene Rubber Surround
• Screw Terminals

Specifications:

• Nominal Impedance: 2 Ω or 8 Ω
• RMS Power Handling: 500 W
• Peak Power Handling: 1500 W
• Frequency Response (-3 dB): 24 Hz – 200 kHz
• Sensitivity (2.83 V/1 M): 90 dB (2 Ω configuration)
• Recommended Amplifier RMS Power Range: 100 W – 1000 W

Dimensions:

Enclosure Performance (See Owner’s Manual For Details):

Sealed Enclosure Volume: 17 liters (0.6 ft³):

Vented Enclosure Volume and Tuning: 28.3 liters (1 ft³), 33 Hz:

Thiele & Small Parameters:

• Revc: 2 Ω or 8 Ω
• Levc @1 kHz: 0.57 mH (2 Ω configuration)
• Sd: 346.3 cm²
• Mmd: 141 g
• Mms: 145 g
• Cms: 169 µM/N
• Vas: 29 liters
• Fs: 32 Hz
• BL: 10.59 TM (2 Ω configuration)
• Qms: 8.03
• Qes: 0.54
• Qts: 0.5
• Xmax (1-way linear): 19 mm (11/16”)
• Basket Displacement: 3.15 liters (0.11 ft³)

GB Subwoofers Owner’s Manual