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TW030WA11/12     30 mm textile tweeter with waveguide, 4/8 ohm

 

 

 

 

 

TW030WA11 and TW030WA12 are tweeters designed for the most demanding applications, where low resonance frequency, high sensitivity and power handling, controlled dispersion, and a very wide frequency range are required.

Frequency resp.
Specifications
Dimensions
Ordering info

FEATURES

TW030WA11/12 photo
  • Featuring waveguide face plate for controlled dispersion, offering optimized off-axis and power response
  • 30 mm voice coil design with high power handling, and low resonance frequency
  • Copper clad center pole yielding very low voice coil inductance for reduced distortion and increased high frequency output
  • 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

Downloads
SPL and impedance response curves as text files

TW030WA11 SPL response

TW030WA11 on-axis SPL response

TW030WA11 imp response

TW030WA11 impedance response

TW030WA12 SPL response

TW030WA12 on-axis SPL response

TW030WA12 imp response

TW030WA12 impedance response

Important!
Please observe that these text files for download are actual measurements of the drivers measured in infinite baffle and without any enclosure. Measuring the drivers in a finite baffle (like the baffle of most speaker cabinets) and in any size of enclosure will lead to different response curves.

FREQUENCY RESPONSE

TW030WA11-SPL-response

Measuring conditions, SPL
Driver mounting: Flush in infinite
     baffle, back side open (no cabinet)
Microphone distance: 1.0 m
Input signal: 2.83 VRMS stepped sine wave
Smoothing: 1/6 oct.

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

TW030WA11-impedance
TW030WA12-SPL-response

Measuring conditions, SPL
Driver mounting: Flush in infinite
     baffle, back side open (no cabinet)
Microphone distance: 1.0 m
Input signal: 2.83 VRMS stepped sine wave
Smoothing: 1/6 oct.

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

TW030WA12-impedance

NOMINAL SPECIFICATIONS

Notes

  Parameter

TW030WA11

TW030WA12

Unit

 

Nominal size

30

30

[mm]

 

Nominal impedance

4

8

[ohm]

 

Recommended frequency range

1.5 - 25

1.5 - 25

[kHz]

1, 4

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

94

92

[dB]

2

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

900

900

[W]

2

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

200

200

[W]

2

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

55

55

[W]

 

Effective radiating area, Sd

11.5

11.5

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

410

425

[Hz]

 

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

0.43

0.40

[g]

3

Force factor, Bxl

1.7

2.0

[N/A]

3, 4, 6

Suspension compliance, Cms

0.35

0.35

[mm/N]

3, 4, 6

Equivalent air volume, Vas

66

66

[mlit.]

3, 4, 6

Mechanical resistance, Rms

0.57

0.57

[Ns/m]

3, 4, 6

Mechanical Q, Qms

1.9

1.9

[-]

3, 4, 6

Electrical Q, Qes

1.34

1.74

[-]

3, 4, 6

Total Q, Qts

0.79

0.90

[-]

4

Voice coil resistance, RDC

3.5

6.5

[ohm]

5

Voice coil inductance, Le (measured at 20 kHz)

23

35

[μH]

 

Voice coil inside diameter

30.4

30.4

[mm]

 

Voice coil winding height

1.7

1.7

[mm]

 

Air gap height

2.5

2.5

[mm]

 

Theoretical linear motor stroke, Xmax

+/-0.40

+/-0.40

[mm]

 

Magnet weight

230

230

[g]

 

Total unit net weight excl. packaging

610

610

[g]

3, 4, 5

Krm

2.9

2.8

[mohm]

3, 4, 5

Erm

0.50

0.53

[-]

3, 4, 5

Kxm

58

424

[mH]

3, 4, 5

Exm

0.20

0.036

[-]

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

HARMONIC DISTORTION

TW030WA11-harmonic-distortion

Measuring conditions, harmonic distortion
Driver mounting: In infinite baffle
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 2.0 VRMS (TW030WA11) / 2.83 VRMS (TW030WA12)
Smoothing: 1/6 oct.

TW030WA12-harmonic-distortion

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

TW030WA11/12 outline drawing
TW030WA11/12-outline-dwg

TERMINAL NOMINAL DIMENSIONS (mm)

TW030WA11_12-terminals

Thickness, both terminals: 0.5 mm
Terminal plating: Gold
Polarity: 4.8 mm terminal is +

PACKAGING AND ORDERING INFORMATION

Part no. TW030WA11-01

4 ohm version, individual packaging (one piece per box)

Part no. TW030WA11-02

4 ohm version, bulk packaging

Part no. TW030WA12-01

8 ohm version, individual packaging (one piece per box)

Part no. TW030WA12-02

8 ohm version, bulk packaging

Latest update: June 24, 2022

 

Specifications are subject to change without any further notice.
Copyright © 2006-2022 by Wavecor Ltd., China. All rights reserved.

 

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MORE INFO

TW030WA11/12 specificationsPDF data sheet

 

 

TW030WA11 REVIEW
by HiFiCompass
Aug. 2, 2018

 

 

 

 

 

 

 

 

 

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