Tang Band W4-1320SJ

SJ

Full-range

Nominal diameter	4″ / 102 mm
Resonance	75 Hz
Q factor	0.35
Sensitivity	89.5 dB
Linear excursion	± 3 mm
Program Power	50 W

Tang Band W4-1320SJ Full-range

Specifications

Sensitivity (1W, 1m, infinite baffle) SPL1W 89.5dB
Frequency response 75 - 20000Hz

Thiele & Small parameters

Resonance frequency (free air) fS 75Hz
Mechanical quality factor QMS 1.29
Electrical quality factor QES 0.49
Total quality factor QTS 0.35

Large signal parameters

Maximum linear excursion xmax 3mm
Air volume displaced at xmax VD 17cm³
Power handling P 25W
Program power Pmax 50W

Voice Coil

Nominal impedance Z 8Ω
DC resistance RE 6.8Ω
Inductance (1kHz) LE 0.013mH
VC Diameter 25.4mm

Magnet

Force factor Bl 4.7N/A
Motor constant Bl/√RE 1.8N/√W
Air gap height HAG 10mm
Material Neodymium

Diaphragm

Effective diameter 85mm
Effective area SD 57cm²
Moving mass MMS 3.49g
Moving mass (without air load) MMD 3.2g
Material Paper

Suspensions

Stiffness KMS 0.719N/mm
Compliance CMS 1391µm/N
Equivalent volume to the compliance VAS 6.41L
Mechanical resistance RMS 1.27N·s/m
Surround material Rubber

Dimensions

Nominal diameter 4″
102mm
Volume occupied by the driver (estimated) 0.28L
Net weight 0.713kg

Tang Band W4-1320SJ SPL & Impedance

Tang Band W4-1320SJ Dimensions

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fS	70 Hz
SD	57 cm²
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Tang Band W4-1320SI Full-range

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fS	75 Hz
SD	57 cm²
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