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TW022WA04     22 mm neodymium chambered textile tweeter, 4 ohm

 

 

 

 

 

TW022WA04 is a compact 22 mm neodymium tweeter for applications where small size is important, while still requiring the highest level of performance

The best of two worlds?
The design with 22 mm voice coil and wide surround caters for both applications that would normally require traditional ” tweeters and those, where 1” tweeters would usually be used.
Featured with a rear chamber these compact tweeters offer very low resonance frequency.
 

TW022WA04 photo

Innovative
In order to keep distortion and resonance frequency low the TW022WA04 is designed around a small external neodymium ring magnet to allow for a larger internal volume than that of traditional neodymium tweeters.
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There is a version of TW022WA04 without face plate available for manufacturers, for building the unit directly into the cabinet baffle. The part number of this version is TW022WA03 and the electrical/acoustical specifications are identical to that of TW022WA04. Please contact us for more information.

Frequency resp.
Specifications
Distortion
Dimensions
Ordering info

Downloads
SPL and impedance response curves as text files

TW022WA04_SPL_frequency_response

TW022WA04 on-axis SPL response

TW022WA04_impedance

TW022WA04 impedance response

Important!
Please observe that these text files for download are actual measurements of the drivers measured in infinite baffle. Measuring the drivers in a finite baffle (like the baffle of most speaker cabinets) will lead to different response curves.

FEATURES

  • 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

SPL FREQUENCY RESPONSE

TW022WA03_04-SPL-response

Measuring conditions, SPL
Driver mounting: Flush in infinite baffle
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.

IMPEDANCE RESPONSE

TW022WA03_04-imp-response

Measuring conditions, impedance
Driver mounting: Free air, no baffle
Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
Smoothing: None

NOMINAL SPECIFICATIONS

Notes

  Parameter

Value

Unit

 

Nominal size

22

[mm]

 

Nominal impedance

4

[ohm]

 

Recommended frequency range

2 - 30

[kHz]

1, 4

Sensitivity, 2.83V/1m (average SPL in range 2 - 20 kHz)

89.5

[dB]

2

Power handling, short term, IEC 268-5, 2.5 kHz@12dB/oct.

 

[W]

2

Power handling, long term, IEC 268-5, 2.5 kHz@12dB/oct.

65

[W]

2

Power handling, continuous, IEC 268-5, 2.5 kHz@12dB/oct.

20

[W]

6

Effective radiating area, Sd

6.1

[sq.cm]

3, 4

Resonance frequency (free air, no baffle), Fs

825

[Hz]

7

Moving mass, incl. air (free air, no baffle), Mms

0.26

[g]

3

Force factor, Bxl

1.60

[N/A]

3, 4

Suspension compliance, Cms

0.144

[mm/N]

3, 4

Equivalent air volume, Vas

7.6

[ml]

3, 4

Mechanical resistance, Rms

0.92

[Ns/m]

3, 4

Mechanical Q, Qms

1.4

[-]

3, 4

Electrical Q, Qes

1.9

[-]

3, 4

Total Q, Qts

0.80

[-]

4

Voice coil resistance, RDC

3.6

[ohm]

5

Voice coil inductance, Le (measured at 20 kHz)

40

[μH]

 

Voice coil inside diameter

22

[mm]

 

Voice coil winding height

1.6

[mm]

 

Air gap height

2.5

[mm]

 

Theoretical linear motor stroke, Xmax

0.45

[mm]

 

Magnet weight

 

[g]

 

Total unit net weight excl. packaging

0.06

[kg]

3, 5

Krm

3.2

[μohm]

3, 5

Erm

1.12

[-]

3, 5

Kxm

3.2

[mH]

3, 5

Exm

0.56

[-]

Note 1

Measured in infinite baffle.

Note 2

Tested in free air (no baffle)

Note 3

Measured using a semi-constant current source, nominal level 2 mA.

Note 4

Measured at 25 deg. C

Note 5

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.

Note 6

Calculated as the area inside the middle of the surround.

Note 7

Determined by physical weighing of the moving parts including the inner half of the surround.

HARMONIC DISTORTION

TW022WA04-Harmonic-Distortion

Measuring conditions, harmonic distortion
Driver mounting: In “infinite” baffle
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 2.83 VRMS
Smoothing: 1/6 oct.
 

TW022WA04 outline drawing

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

TW022WA04-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

TW022WA03_04-terminals

PACKAGING AND ORDERING INFORMATION

Part no. TW022WA04-01

Version with face plate, individual packaging (one pair per box)

Part no. TW022WA04-02

Version with face plate, bulk packaging

Latest update: April 21, 2018

 

Specifications are subject to change without any further notice.
Copyright © 2006-2018 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

TW022WA03 & -04 specificationsPDF data sheet

 

 

 

 

 

 

 

 

All Wavecor drive units

 

Technical pages

 

 

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