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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_12-300px
  • 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

FREQUENCY RESPONSE

TW030WA11-freq-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-freq-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)

93.5

91

[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.

 

 

[W]

2

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

45

45

[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

 

 

[g]

 

Total unit net weight excl. packaging

0.70

0.70

[kg]

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

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

TW030WA09_10 outline drawing
TW030WA11_12-outline-dwg

TERMINAL NOMINAL DIMENSIONS (mm)

TW030WA11_12-terminals

Thickness, both terminals: 0.5 mm
Terminal plating: Gold

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: September 10, 2014

 

Specifications are subject to change without any further notice.
Copyright © 2006-2014 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

TW030WA09_10 specificationsPDF data sheet
(828 KB )

 

 

 

 

 

 

 

 

All Wavecor drive units

 

 

 

 

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