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TW022WA05   22 mm textile tweeter, low resonance, 4 ohm

 

 

 

 

TW022WA05 is a tweeter designed for applications requiring the highest level of performance and most extended and linear high frequency response.

Innovation
Tweeters used to feature a separate rear chamber in order to obtain low resonance frequency. Not any longer. By designing the internal parts to accommodate new larger internal volumes, the TW022WA05 offers an unusually low  resonance frequency.
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.

FEATURES

TW022WA05_300px

Frequency resp.
Specifications
Dimensions
Ordering info

  • 22 mm design for optimal compromise between on- and off-axis frequency response, resonance frequency, and power handling
  • Internal volumes for low 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

FREQUENCY RESPONSE

TW022WA05-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

TW022WA05-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

2.5 - 25

[kHz]

1, 4

Sensitivity, 2.83V/1m (average SPL in range 2.5 - 20 kHz)

91.5

[dB]

2

Power handling, short term, IEC 268-5, 2 kHz@12dB/oct.

 

[W]

2

Power handling, long term, IEC 268-5, 2 kHz@12dB/oct.

80

[W]

2

Power handling, continuous, IEC 268-5, 2 kHz@12dB/oct.

25

[W]

 

Effective radiating area, Sd

6.1

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

750

[Hz]

 

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

0.28

[g]

3

Force factor, Bxl

1.9

[N/A]

3, 4, 6

Suspension compliance, Cms

0.16

[mm/N]

3, 4, 6

Equivalent air volume, Vas

0.0085

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.25

[Ns/m]

3, 4, 6

Mechanical Q, Qms

5.3

[-]

3, 4, 6

Electrical Q, Qes

1.36

[-]

3, 4, 6

Total Q, Qts

1.08

[-]

4

Voice coil resistance, RDC

3.7

[ohm]

5

Voice coil inductance, Le (measured at 20 kHz)

36

[μH]

 

Voice coil inside diameter

22

[mm]

 

Voice coil winding height

1.8

[mm]

 

Air gap height

2.5

[mm]

 

Theoretical linear motor stroke, Xmax

0.35

[mm]

 

Magnet weight

139

[g]

 

Total unit net weight excl. packaging

0.34

[kg]

3, 4, 5

Krm

0.0046

[mohm]

3, 4, 5

Erm

1.07

[-]

3, 4, 5

Kxm

1.10

[mH]

3, 4, 5

Exm

0.67

[-]

Note 1

Measured in infinite baffle.

Note 2

Tested in free air (no cabinet).

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

Measured before burn in

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

TW022WA05 outline drawing
TW022WA05-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

TW022WA05-terminals

Thickness, both terminals: 0.5 mm
Terminal plating: Gold

PACKAGING AND ORDERING INFORMATION

Part no. TW022WA05-01

Individual packaging (one piece per box)

Part no. TW022WA05-02

Bulk packaging

Latest update: January 29, 2013
 

 

Specifications are subject to change without any further notice.
Copyright © 2006-2013 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

TW022WA05 specificationsPDF data sheet
(1.16 MB)

 

 

 

 

 

 

 

 

All Wavecor drive units

 

Technical pages

 

 

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