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- 22 mm design for optimal compromise between on- and off-axis frequency response, resonance frequency, and power handling
- Rear chamber for low resonance frequency and reduced distortion
- Outside ring neodymium magnet for lower resonance frequency and distortion
Precision-coated textile diaphragm for improved consistency and high-frequency extension
- Optimized dome shape for ultra high frequency cutoff
- Vented voice coil former for reduced distortion and compression
- Copper-clad aluminium voice coil wire offering lower moving mass for improved efficiency and transient response
- Build-in cavities under dome/edge to equalize pressure for lower distortion and lower resonance frequency
- Flexible lead wires for higher power handling and larger excursion
- Gold plated terminals to prevent oxidation and ensure long-term reliable connection
- Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing (TW022WA04 only)
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SPL FREQUENCY RESPONSE
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IMPEDANCE RESPONSE
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NOMINAL SPECIFICATIONS
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Notes
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Parameter
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Value
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Unit
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Nominal size
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22
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[mm]
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Nominal impedance
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4
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[ohm]
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Recommended frequency range
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2 - 30
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[kHz]
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1, 4
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Sensitivity, 2.83V/1m (average SPL in range 2 - 20 kHz)
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89
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[dB]
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2
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Power handling, short term, IEC 268-5, 3.0kHz@12dB/oct.
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[W]
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2
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Power handling, long term, IEC 268-5, 3.0kHz@12dB/oct.
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[W]
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2
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Power handling, continuous, IEC 268-5, 3.0kHz@12dB/oct.
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[W]
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6
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Effective radiating area, Sd
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6.1
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[sq.cm]
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3, 4
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Resonance frequency (free air, no baffle), Fs
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800
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[Hz]
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7
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Moving mass, incl. air (free air, no baffle), Mms
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0.27
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[g]
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3
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Force factor, Bxl
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1.7
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[N/A]
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3, 4
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Suspension compliance, Cms
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0.15
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[mm/N]
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3, 4
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Equivalent air volume, Vas
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7.7
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[ml]
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3, 4
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Mechanical resistance, Rms
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0.97
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[Ns/m]
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3, 4
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Mechanical Q, Qms
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1.4
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[-]
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3, 4
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Electrical Q, Qes
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1.69
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[-]
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3, 4
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Total Q, Qts
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0.77
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[-]
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4
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Voice coil resistance, RDC
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3.6
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[ohm]
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5
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Voice coil inductance, Le (measured at 20 kHz)
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40
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[μH]
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Voice coil inside diameter
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22
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[mm]
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Voice coil winding height
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1.6
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[mm]
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Air gap height
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2.5
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[mm]
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Theoretical linear motor stroke, Xmax
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±0.45
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[mm]
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Magnet weight
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[g]
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Total unit net weight excl. packaging
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[kg]
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3, 5
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Krm
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[mohm]
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3, 5
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Erm
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[-]
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3, 5
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Kxm
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[mH]
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3, 5
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Exm
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[-]
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Note 1
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Measured in infinite baffle.
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Note 2
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Tested in free air (no baffle)
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Note 3
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Measured using a semi-constant current source, nominal level 2 mA.
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Note 4
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Measured at 25 deg. C
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Note 5
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It is generally a rough simplification to assume that loudspeaker transducer voice coils exhibit the characteristics of an inductor. Instead it is a far more accurate approach to use the more advanced model often referred to as the “Wright empirical model”, also used in LEAP-4 as the TSL model (www.linearx.com), involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper (PDF) here.
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Note 6
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Calculated as the area inside the middle of the surround.
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Note 7
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Determined by physical weighing of the moving parts including the inner half of the surround.
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OUTLINE DRAWING AND NOMINAL DIMENSIONS, TW022WA03 (mm)
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OUTLINE DRAWING AND NOMINAL DIMENSIONS, TW022WA04 (mm)
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TERMINAL NOMINAL DIMENSIONS (mm)
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PACKAGING AND ORDERING INFORMATION
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Part no. TW022WA03-01
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Version without face plate, bulk packaging (OEM only)
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Part no. TW022WA04-01
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Version with face plate, individual packaging (one pair per box)
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Part no. TW022WA04-02
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Version with face plate, bulk packaging
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Latest update: December 26, 2012
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Specifications are subject to change without any further notice.
Copyright © 2006-2012 by Wavecor Ltd., Guangzhou, China. All rights reserved.
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MORE INFO
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