Specification Sheet

BOX SPECS
SEALED BOX RANGE:
Net Internal Volume: 0.55 - 1.0 ft
3
RECOMMENDED SEALED BOX:
External Dimensions: 14” x 14” x 11”
Gross Internal Volume: 0.85 ft
3
Net Internal Volume: 0.75 ft
3
D2 - F3, Qtc: 43 Hz, 0.65
D4 - F3, Qtc: 39 Hz, 0.84
VENTED BOX RANGE:
Net Internal Volume: 1.0 - 1.5 ft
3
Fb, Tuning: 33-37 Hz
RECOMMENDED VENTED BOX:
External Dimensions: 12.5” x 14” x 25.5”
Gross Internal Volume: 1.91 ft
3
Vent Area (W x H): 18.75 in
2
(12.5” x 1.5”)
Vent Length: 22”
Vent Displacement: 0.36 ft
3
Net Internal Volume (Vb): 1.45 ft
3
D2 - F3, Ripple, Fb: 29 Hz, 4.3 dB, 36 Hz
D4 - F3, Ripple, Fb: 28 Hz, 5.8 dB, 36 Hz
R2-W12D2 - THIELE-SMALL PARAMETERS
• Sensitivity (1W/1m): 85 dB
• DC Resistance (R
e
): 1.9∆ + 1.9∆
• Free Air Resonance (F
s
): 29 Hz
• Equivalent Stiffness: 36.9 L
• Mechanical Q (Q
ms
): 6.32
• Electrical Q (Q
es
): 0.44
• Total Q (Q
ts
): 0.41
• Cone Area (S
d
): 479 cm
2
• Linear Excursion (X
max
): 20 mm
• Mechanical Travel (X
mech
): 72 mm
R2-W12D4 - THIELE-SMALL PARAMETERS
• Sensitivity (1W/1m): 84.6 dB
• DC Resistance (R
e
): 3.5∆ + 3.5∆
• Free Air Resonance (F
s
): 30 Hz
• Equivalent Stiffness: 32.8 L
• Mechanical Q (Q
ms
): 6.51
• Electrical Q (Q
es
): 0.55
• Total Q (Q
ts
): 0.51
• Cone Area (S
d
): 479 cm
2
• Linear Excursion (X
max
): 20 mm
• Mechanical Travel (X
mech
): 72 mm
• Size: 12”
• Dimensions: 11.61
”
x 11.61
”
x 6.43
”
• Frequency Response: 24Hz - 200Hz
• Power Range: 300W - 750W RMS
• Power Handling: 750W RMS / 2250W Peak
• Magnet Weight: 144 oz
• Voice Coil Diameter: 65.5 mm (2.6”)
GENERAL SPECS
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@alpineusa
R2-W12D2/D4
12” R-Series “R2” Subwoofer