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Tang Band W8-1772

Pair of Tang-Band W8-1772 8 inch Fullrange Drivers

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 Link To Tang Band W8-1772 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.

Tang Band W8-1772 responce at 1m on axis and 15 and 30 degrees of axis in 18 ltr sealed box Tang Band W8-1772 responce at 1m on axis and 15 and 30 degrees of axis in the Universal Horn

Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis


Second, Third and Fourth Harmonic of Tang Band W8-1772 in 18 ltr sealed box Second, Third and Fourth Harmonic of Fostex Tang Band W8-1772 in the Universal Horn

The second, third and fourth harmonic curves measured at 2.83V input RMS.



Burst decay Responce of Tang Band W8-1772 at 1m in 19 ltr sealed box Burst decay Responce of Tang Bamd W8-1772 at 1m in the Universal Horn

Burst decay response, measured at 1m on axis


The impedance of Tang Band W8-1772 in free air and in 18 ltr seled box The impedance of Tang Band W8-1772 in Universal Horn

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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