Rutcho's Audio Page dedicated to Hi-End Audio Systems Fullrange Speakers Tube Amplifiers

Ruitcho's page dedicated to hi-end audio Blackswift Audio Logo

Tang Band W4-1320 SB

Pair of Tang Band W4-1320 SB 4 inch Fullrange Drivers

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  Link To Tang Band W4-1320 Manufacturer's Datasheet

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

SPL Responce of Tang Band W4-1320 SB at 1m on axis and 15 30 deg off axis

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. 

Second, Third and Fourth Harmonic of Tang Band W4-1320 SB in 18 ltr sealed box

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

Burst decay Responce of Tang Band W4-1320 SB at 1m in 18 ltr sealed box

Burst decay response, measured at 1m on axis

The impedance ofTang Band W4-1320 SB in 18 ltr seled box

The impedance curve in 18 ltr sealed box


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.

Arrow up icon To The Top Arrow up icon