Tang Band W4-1320 SB
Tang band W4-1320 is an excellent example for compact multy-purpose fullrange driver. It features a special paper cone with bamboo fibers, underhung magnet system, aluminum phase plug, very well designed die-cast basked with vented spider and pole piece.
This is the manufacturer's brochure
My Measurements
| Driver Properties | Thiele - Small Parameters | ||||
|---|---|---|---|---|---|
| Chassis material | Die Cast Aluminum Alloy | Parameter | Measured | Datasheet | |
| Membrane material | Bamboo Paper | Fs | 82.2Hz | 75 Hz | |
| Magnet System | Neodymium | Re | 6.5 Ω | 6.8 Ω | |
| Surround | Rubber | Qms | 1.54 | 1.29 | |
| Voice Coil Diameter | 25.4 mm | Qes | 0.51 | 0.49 | |
| Nominal Impedance | 8 Ω | Qts | 0.38 | 0.35 | |
| Sensitivity | 89 dB/W/m | Vas | 3.2 ltr | 6.4 ltr | |
| Rated Power | 25W | Le | 0.035 mH | 0.013 mH | |
Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis
This amazing driver keeps almost linear frequency response up to 35
KHz on axis.
The second, third and fourth harmonic curves measured at 2.83V input RMS.
Burst decay response, measured at 1m on axis
The impedance curve in 18 ltr sealed box
Conclusion
All the measurements of Tang Band W8-1320 SB show a wise designed versatile fullrange driver with a very wide frequency response with a good of-axis dissipation and low distortion. It is not surprise that the sound reproduction is excellent in many types of construction, starting with single-driver bass-reflex and TL constructions, line arrays and ending as a wide midrange in a high-quality multy-way systems.
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