Specification Sheet

BOX SPECS
SEALED BOX RANGE:
Net Internal Volume: 0.15 - 0.45 ft
3
RECOMMENDED SEALED BOX:
External Dimensions: 13” x 13” x 5.5”
Gross Internal Volume: 0.30 ft
3
Net Internal Volume: 0.25 ft
3
D2 - F3, Qtc: 59Hz, 0.73
D4 - F3, Qtc: 59Hz, 0.72
VENTED BOX RANGE:
Net Internal Volume: 0.25 - 0.7 ft
3
Fb, Tuning: 36-40Hz
RECOMMENDED VENTED BOX:
External Dimensions: 11” x 9.5” x 21”
Gross Internal Volume: 0.86 ft
3
Vent Area (W x H): 8 in
2
(8” x 1”)
Vent Length: 17.5”
Vent Displacement: 0.13 ft
3
Net Internal Volume (Vb): 0.68 ft
3
D2 - F3, Ripple, Fb: 33Hz, 2.5 dB, 39Hz
D4 - F3, Ripple, Fb: 32Hz, 3.2 dB, 39Hz
R2-W12D2 - THIELE-SMALL PARAMETERS
• Sensitivity (1W/1m): 83.6 dB
• DC Resistance (R
e
): 1.8∆ + 1.8∆
• Free Air Resonance (F
s
): 42 Hz
• Equivalent Stiffness: 10.1 L
• Mechanical Q (Q
ms
): 7.69
• Electrical Q (Q
es
): 0.52
• Total Q (Q
ts
): 0.48
• Cone Area (S
d
): 201 cm
2
• Linear Excursion (X
max
): 12 mm
• Mechanical Travel (X
mech
): 52 mm
R2-W12D4 - THIELE-SMALL PARAMETERS
• Sensitivity (1W/1m): 83.7 dB
• DC Resistance (R
e
): 3.6∆ + 3.6∆
• Free Air Resonance (F
s
): 43 Hz
• Equivalent Stiffness: 10.5 L
• Mechanical Q (Q
ms
): 7.08
• Electrical Q (Q
es
): 0.58
• Total Q (Q
ts
): 0.53
• Cone Area (S
d
): 201 cm
2
• Linear Excursion (X
max
): 12 mm
• Mechanical Travel (X
mech
): 52 mm
• Size: 8”
• Dimensions: 7.64
”
x 7.64
”
x 4.56
”
• Frequency Response: 30Hz - 200Hz
• Power Range: 150W - 350W RMS
• Power Handling: 350W RMS / 1000W Peak
• Magnet Weight: 56 oz
• Voice Coil Diameter: 40 mm (2.6”)
GENERAL SPECS
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@alpineusa
R2-W8D2/D4
8” R-Series “R2” Subwoofer