Tang Band W3-1878 Fullrange Speaker Driver Transducer
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Tang Band W3-1878 Fullrange Speaker Driver Transducer
The Tang Band W3-1878 is a 3" (75 mm) diameter fullrange speaker driver. The W3-1878 fullrange speaker driver features a underhung motor design with a large neodymium magnet. The speaker driver is built on a thick cast frame and uses a bamboo fiber paper cone and a rubber surround. Together, the driver has a relatively large excusrion (Xmax 4 mm). The W3-1878 speaker driver uses a unique phase plug which provides better high frequency dispersion. The Tang Band W3-1878 fullrange speaker driver is capable of an extended frequency response from about 90Hz to 20kHz. In North Americal the Tang-Band W3-1878 driver is available for purchase from Parts Express.
Photograph 1: Tang Band W3-1878 Fullrange Speaker Drivers
Photograph 2: Bottom - Tang Band W3-1878 Fullrange Speaker Drivers
The Tang Band W3-1878 speaker drivers came neatly packaged in a cardboard boxes which indicated that the speakers were manufactured in China. There was no gasket, mounting screws or datasheet provided with the W3-1878 drivers.
Photograph 3: Tang Band W3-1878 Fullrange Speaker Driver Boxes
The Tang Band W3-1878 speaker is an overall excellent driver. The W3-1878 is beautifully manufactured and sounds equally as nice. The driver provides a very wide frequency response and distortion is low. The off-axis performance excellent within about 15 degrees. The W3-1878 is a top performing speaker driver that provides good value. The Tang Band W3-1878 speaker driver is available from Parts Express.
Thiele/Small (T/S) Parameters - Tang Band W3-1878 Speaker Driver
The Thiele/Small Parameters of the Tang Band W3-1878 speaker drivers have been measured using the Dayton Audio Test Systems (DATS). The T/S parameters from the small signal speaker testing as well as the parameters noted on the W3-1878 datasheet are summarized in Table 1. The measurements were made at a room temperature of about 18 degrees Celsius.
Table 1: Thiele/Small (T/S) Parameters - Tang Band W3-1878 Fullrange Driver
| Parameter | Tang Band | Driver 1 | Driver 2 |
| Fs | 75 Hz | 87.48 Hz | 86.81 Hz |
| Vas | 3.08 L | -- | 2.356 L |
| Qts | 0.28 | 0.37 | 0.349 |
| Qes | 0.34 | 0.457 | 0.434 |
| Qms | 1.67 | 1.93 | 1.78 |
| Re | 6.5 Ohms | 6.42 Ohms | 6.69 Ohms |
| Le | 0.023 mH | -- | -- |
| Le @ 1 kHz | -- | 0.901 mH | 0.907 mH |
| Le @ 10kHz | -- | 0.182 mH | 0.183 mH |
| SPL | 88 dB | 87.6 dB | 87.4 dB |
Notes:
- SPL estimated with Radio Shack 33-2050 SPL Meter.
- T/S parameter measurements made with Dayton Audio Test Systems (DATS).
Figure 1 shows the impedance sweep of the Tand Band W3-1878 speaker driver produced using the Dayton Audio Test Systems (DATS).
Figure 1: Tang Band W3-1878 Measured Impedance Response Plot
The frequency and impedance response plot from the Tang Band W3-1878 datasheet is show in Figure 2.
Figure 2: Tang Band W3-1878 Frequency Response and Impedance (from Datasheet)
Datasheet - Tang Band W3-1878 3" Paper Fullrange Speaker
- Tang Band W3-1878 3" Paper Fullrange Speaker Datasheet - (PDF 507 kB)
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