Precision Devices PD.121

Specifications:

• Nominal Diameter 30cm (12")
• Power rating 300 Watts
• Frequency range 100Hz to 6 kHz
• Nominal Impedance 8 or 16 Ohms
• Sensitivity (1 W, 1 M) 99 dB
• Resonance 53.27 Hz
• Enc. Vol. Recommended 10 to 60 Litres
• Displacement limit 10 mm (0.40')
• Voice coil diameter 63 mm (2.52')
• Voice coil Copper
• Voice coil depth 12 mm (0.48')
• Suspension (Spider) Fabric
• Magnet gap depth 9 mm (0.36')
• Magnet material/mass Ceramic/2.5 Kg (90 oz.)
• Magnetic assembly total mass 7.8 Kg (17.24 Lbs.)
• Flux Density 1.5 Tesla
• Cone type/material Curvilinear Smooth Paper
• Surround Fabric
• Dust dome Paper
• Connectors Spring loaded push button metal bodied
• Polarity Positive Voltage on Red Terminal gives forward cone motion

Thiele-Small Parameters

• Fs 53.27 Hz
• Xmax 2.7 mm
• Revc 5.93 Ohms
• Vd 0.143 litres
• Qts 0.23
• No 5.1%
• Qms 14.66
• Pmx 300 Watts
• Qes 0.23
• Cms 168 micro m/N
• Vas 66.58 Litres
• Mms 65.37 grams
• Sd 530.93 sq cm
• BL 21.46 Tm

Mounting and Shipping Information:

• Overall Diameter 330 mm
• Width Across Flats 320.5 mm
• Flange Height 10 mm
• Depth (Excl. Flange) 115 mm
• Magnet Diameter 200 mm
• Chassis Shoulder Diameter 282 mm
• Outer Bolt Circle 6 * M6 on 318mm PCD
• Inner Bolt Circle 8 * M6 on 293mm PCD
• Nett Weight 9.2 Kg / 20.28 lb.
• Shipping Weight 10 Kg / 22.05 lb.

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