Alpine X-W12D4 Users Guide
X-W12D4
12” X-Series Dual 4∆ Subwoofer
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PRODUCT OVERVIEW
The powerful X-Series subwoofers combine groundbreaking Alpine
technologies along with modern, exaggerated design and components to
give you a high-performance subwoofer that requires very little enclosure
space. With 48mm of total excursion, the X-W12D4 is able to produce
impressive amounts of bass while maintaining control and accuracy.
PRODUCT FEATURES
Impressive Output – A powerful, motor comprised of a premium, elongated
voicecoil1 and triple stacked ferrite magnets3 reproduce the bass you crave
Unprecedented Accuracy – The unmatched 48mm of total excursion is
controlled by a dual spider2, and the iconic HAMR Surround
Install Friendly Design – The overbuilt motor allows a small box requirement
while the locking trim ring5 ensure a beautiful t and nish
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POWER RANGE: 450-900W
RECOMMENDED AMPS:
RECOMMENDED AMPS:
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S-A60M R-A75M X-A90M
S-A60M (x2) R-A75M (x2) X-A90M (x2)
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X-W12D4
12” X-Series Dual 4∆ Subwoofer
GENERAL SPECS
BOX SPECS
SEALED BOX RANGE:
Net Internal Volume: 0.4 - 1.25 ft
RECOMMENDED SEALED BOX:
External Dimensions: 14” x 14” x 12.25”
Gross Internal Volume: 0.97 ft
Net Internal Volume: 0.85 ft
F3, Qtc: 36 Hz, 0.99
VENTED BOX RANGE:
Net Internal Volume: 1.0 - 2.0 ft
Fb, Tuning: 30-36 Hz
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• Size: 12”
• Dimensions: 11.875” x 11.875” x 7.25
”
• Frequency Response: 24Hz - 200Hz
• Power Range: 450W - 900W RMS
• Power Handling: 900W RMS / 2700W Peak
• Magnet Weight: 174 oz (x3)
• Voice Coil Diameter: 65.5 mm (2.6”)
THIELE-SMALL PARAMETERS
• Sensitivity (1W/1m): 84.3 dB
• DC Resistance (Re): 3.6∆ + 3.6∆
• Inductance (Le): 4.42 mH
• Free Air Resonance (Fs): 27 Hz
• Equivalent Stiffness: 56 L
• Mechanical Q (Qms): 5.63
• Electrical Q (Qes): 0.62
• Total Q (Qts): 0.56
• Cone Area (Sd): 472 cm
• Linear Excursion (X
• Mechanical Travel (X
): 24 mm
max
): 82 mm
mech
• Displacement Volume (Vd): .12 ft
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RECOMMENDED VENTED BOX:
External Dimensions: 14” x 23.5” x 14”
Gross Internal Volume: 1.98 ft
Vent Area (W x H): 15.0 in
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(3.75” x 4”)
Vent Length: 18”
Vent Displacement: 0.21 ft
Net Internal Volume (Vb): 1.65 ft
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F3, Ripple, Fb: 28 Hz, 5.7 dB, 33 Hz
RECOMMENDED ENCLOSURE RESPONSE CURVES:
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