Tang Band W8-1772
The interest in full-range loudspeakers increased significantly in the last decade. Many companies started to fill this market niche,
unfortunately without the necessary knowledge and as a result many useless drives were produced.
This cannot be said for the Tang Band products. TB-1772 is very well engineered driver for
back-loaded horn applications. It has a strong
neodymium magnet system with underhung design and aluminum phase
plug.
This is the manufacturer's datasheet
My Measurements
| Driver Properties | Thiele - Small Parameters | ||||
|---|---|---|---|---|---|
| Chassis material | Vacuum-molded aluminum alloy | Parameter | Measured | Datasheet | |
| Membrane material | Paper | Fs | 42 Hz | 42 Hz | |
| Magnet System | Neodymium | Re | 6.9 Ω | 6.8 Ω | |
| Surround | Impregnated Cloth | Qms | 1.20 | 1.02 | |
| Voice Coil Diameter | 32 mm | Qes | 0.38 | 0.36 | |
| Nominal Impedance | 8 Ω | Qts | 0.29 | 0.27 | |
| Sensitivity | 95 dB/W/m | Vas | 87 ltr | 94 ltr | |
| Rated Power | 30W | Le | 0.01 mH | 0.009 mH | |
This driver is suitable for back-loaded horn applications.
That's why I included a measurements in so-called "Universal" Horn.
More details about this project can be found
here.
Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis
The second, third and fourth harmonic curves measured at 2.83V input RMS.
Burst decay response, measured at 1m on axis
The impedance curves
Conclusion
Tang Band W8-1772 is maybe the best value-for-money performer in current production. It is very well tonal balanced and it can play really loud. The only drawback I can remark is a slight lack of details in a very low volume. It is compatible with most of tube amplifier constructions. The back-loaded horns with this driver gives the best result with SE amplifiers, based on the high-power versions of 300B (KR, EML).
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