http://www.parts-express.com/pe/showdet ... er=264-914Tang Band W4-1320SIF 4" Bamboo Full Range Speaker
Tang Band's W4-1320SIF 4" speaker features a bamboo fiber paper cone with half-roll rubber surround. This optimally damped cone material is rigid, lightweight, and durable. The driver's 18 oz. ceramic ferrite magnet and underhung 1" voice coil do their part to ensure very low 2nd and 3rd order distortion. A machined aluminum phase plug improves high frequency performance, and a strong cast aluminum chassis maintains proper component alignment. Also available in a truncated frame version, the W4-1320SJF.
PRODUCT SPECIFICATIONS
Power Handling (RMS) 25 Watts
Power Handling (max) 50 Watts
Impedance 8 ohms
Frequency Response 75 to 20,000 Hz
Sensitivity 88 dB 1W/1m
Voice Coil Diameter 1"
Magnet Weight 18.6 oz.
THIELE-SMALL PARAMETERS
Resonant Frequency (Fs) 75 Hz
DC Resistance (Re) 6.3 ohms
Voice Coil Inductance (Le) 0.02 mH
Mechanical Q (Qms) 2.52
Electromagnetic Q (Qes) 0.42
Total Q (Qts) 0.36
Compliance Equivalent Volume (Vas) 0.18 ft.³
Mechanical Compliance of Suspension (Cms) 1.13 mm/N
BL Product (BL) 5.31 Tm
Diaphragm Mass Inc. Airload (Mms) 3.99g
Maximum Linear Excursion (Xmax) 3 mm
Surface Area of Cone (Sd) 57 cm²
MATERIALS OF CONSTRUCTION
Cone Material Bamboo Fiber / Paper
Surround Material Rubber
Basket / Frame Material Cast Aluminum
Magnet Material Ferrite
MOUNTING INFORMATION
Overall Outside Diameter 4.94"
Baffle Cutout Diameter 3.74"
Depth 3.24"
# Mounting Holes 4
BOX SIZE (MODELED WITH BASS BOX USING HIGH FIDELITY SETTINGS)
Sealed Volume 0.04 ft.³
Sealed F3 166 Hz
Vented Volume 0.10 ft.³
Vented F3 96 Hz
From that I went to an on line calculator:
DUAL FOLD ON-AXIS TRANSMISSION LINE ENCLOSURE CALCULATOR
By: DB DYNAMIX AUDIO
http://dbdynamixaudio.com/62/dual-fold- ... alculator/ The below is from the calculator with the speakers parameters input (more or less, I just did it quickly)
Conversions:
1 cubic feet 28.32 liters
1 inches 25.4 millimeters
8.85 sq. inches 57.09666 sq. cm
8.8
16.5 liters 0.582692001 cubic feet
25.4 millimeters 1 inches
57 sq. cm 8.83501767 sq. cm
Constants:
Temperature: 75 Degrees F
Speed of Sound: 1134.351066667 Feet/Sec.
Driver Specifications:
# of Drivers: 1
FS: 75 hertz
QTS: 0.36
VAS (Cubic Feet): 0.18
SD (sq. inches): 8.85 required
Driver Displacement: cubic feet
Enclosure Specifications:
1/4 WaveTuning Point: 34.636673791 hertz
Line Volume: 7.138537964 cubic feet
Recommended Line Volume: -0.228798005 cubic feet
Cross Sectional Area of Line: 127.88 sq. inches
Minimum X-Sectional Area: 8.85 sq. inches
Line Depth (inches): 7.75 required
Maximum Dimensions:
External Height (inches): 18 required
External Width (inches): 33.5 required
External Depth (inches): 26.25
Material Thickness (inches): 0.75 required
Bracing Ect. Displacement: 0 cubic feet
Panel Dimensions:
Top (Green): 33.5 X 26.25
Bottom (Green): 33.5 X 26.25
Front Baffle (Orange): 25 X 16.5
Rear Baffle (Yellow): 33.5 X 16.5
Side Panel (Blue): 24.75 X 16.5
Side Panel (Red): 25.5 X 16.5
Inner Panel 1 (Teal): 17 X 16.5
Inner Panel 2 (Purple): 15.75 X 16.5
Inner Panel 3 (Pink): 15.75 X 16.5
Corner Reflector Plates
# Needed: 5
Height: 16.5 inches
Width 1: 6.42 inches
Width 2: 4.92 inches
Angle: 45 degrees