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12PR310 { 12" - 300 W - 98 dB - 4 Ohm }
Available Impedance: 4 Ohm8 Ohm16 Ohm
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Nominal Specifications
Nominal Diameter 300 mm (12 in)
Overall Diameter 316 mm (12.44 in)
Bolt Circle Diameter 298.5 mm (11.75 in)
Baffle Cutout Diameter 282 mm (11.10 in)
Depth 135 mm (5.31 in)
Flange and Gasket Thickness 12 mm (0.47 in)
Net Weight 4.3 kg (9.5 lb)
Shipping Box
(Single Carton Box)		 350 x 346 x 190 mm
(13.8 x 13.6 x 8.5 in)
Shipping Weight 5 kg (11.0 lb)


Technical Parameters
Nominal Impedance 4 Ohm
Minimum Impedance 4 Ohm
AES Power Handling (1) 300 W
Maximum Power Handling (2) 600 W
Sensitivity (1W/1m) 98 dB
Frequency Range 50÷4000 Hz
Voice Coil Diameter 65 mm (2.56 in)
Winding Material Al
Former Material Glass Fiber
Winding Depth 12.5 mm (0.49 in)
Magnetic Gap Depth 8 mm (0.31 in)
Flux Density 1.2 T
Magnet Ferrite Ring
Basket Material Aluminum
Demodulation No
Cone Surround (3) M-Roll
NET Air Volume filled by Loudspeaker 1.9 dm^3 (0.067 ft^3)
Spider Profile 1x variable height waves
Thiele and small parameters
Fs 50 Hz
Re 3.3 Ohm
Qes 0.43
Qms 13.6
Qts 0.42
Vas 77.3 dm^3 (2.73 ft^3)
Sd 533 cm^2 (82.62 in^2)
Xmax (4) 4.92 mm
Xdamage (5) 15.2 mm
Mms 52 g
Bl 11.2 N/A
Le 0.44 mH
Mmd 38.1 g
Cms 0.19 mm/N
Rms 1.2 kg/s
Eta Zero 2.18 %
EBP 116 Hz


PART NUMBER (P/N)
Push Terminals - 4 Ohm Version 03004121



Notes:
(1) 2 Hours Test According to AES 2-1984 Rev. 2003
(2) Maximum power is defined as 3dB greater than nominal power.
(3) Treated Polycotton
(4) Xmax= [(winding depth - magnetic gap depth)/2] + (magnetic gap depth/3)
(5) Maximum excursion before permanent damage
Quick acoustic specs
Nominal Impedance 4 Ohm
Minimum Impedance 4 Ohm
AES Power Handling (1) 300 W
Sensitivity (1W/1m) 98 dB
Frequency Range 50÷4000 Hz
Flux Density 1.2 T
Magnet Ferrite Ring
Demodulation No
Cone Surround (2) M-Roll
Fs 50 Hz
Re 3.3 Ohm
Qes 0.43
Qms 13.6
Qts 0.42
Vas 77.3 dm^3 (2.73 ft^3)
Sd 533 cm^2 (82.62 in^2)
Xmax (3) 4.92 mm
Xdamage (4) 15.2 mm
Mms 52 g
Bl 11.2 N/A
Le 0.44 mH
Mmd 38.1 g
Cms 0.19 mm/N
Rms 1.2 kg/s
Eta Zero 2.18 %
EBP 116 Hz



Note:
(1) 2 Hours Test According to AES 2-1984 Rev. 2003
(2) Treated Polycotton
(3) Xmax= [(winding depth - magnetic gap depth)/2] + (magnetic gap depth/3)
(4) Maximum excursion before permanent damage
Quick mechanical specs
Nominal Diameter 300 mm (12 in)
Overall Diameter 316 mm (12.44 in)
Bolt Circle Diameter 298.5 mm (11.75 in)
Baffle Cutout Diameter 282 mm (11.10 in)
Depth 135 mm (5.31 in)
Flange and Gasket Thickness 12 mm (0.47 in)
Net Weight 4.3 kg (9.5 lb)
Shipping Box
(Single Carton Box)		 350 x 346 x 190 mm
(13.8 x 13.6 x 8.5 in)
Shipping Weight 5 kg (11.0 lb)