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Thumbnail Filmstrip of 13mm TW013WA01 Neodymium Dome 4 Ohm Images
Wavecor Speaker Driver - TW013WA01 - 13mm Neodymium Textile Tweeter - 4 Ohm
Description
TW013WA01 is a very compact high performance tweeter that is ideal either as a super tweeter in high-end Hi Fi speakers or as tweeter in very small compact 2-way systems. Despite being designed for ultimate high frequency performance no compromise has been accepted at the lower frequencies either. The TW013WA01 incorporates an external ring neodymium magnet, which allows effective venting through the centre pole to a rear volume. It means that the TW013WA-01 offers a very low resonance frequency for its size - even lower than many larger tweeters.
Features
- 13 mm design for best high frequency extension and off-axis frequency response
- Internal volumes and rear venting chamber for low resonance frequency and low distortion
- Precision-coated textile diaphragm for improved consistency and high-frequency extension
- Optimized dome shape for ultrahigh 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
- High-stability ferro fluid for increased power handling
- 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 SPL and Impedance Response Graphs
Loudspeaker Frequency Response Graph
Measuring conditions, SPL
Driver mounting: Flush in infinite baffle
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.
Loudspeaker Impedance Response Graph
Measuring conditions, impedance
Driver mounting: Free air, no baffle
Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
Smoothing: None
Technical Specifications
| Notes | Parameter | Value | Unit |
| Nominal size | 13 | mm | |
| Nominal impedance | 4 | Ohm | |
| Recommended frequency range |
5-50 | kHz | |
| 1, 4 | Sensitivity, 2.83V/1m (average SPL in range 5 - 20 kHz) | 87 | dB |
| 2 | Power handling, short term, IEC 268-5, 6 kHz @ 12dB/oct. | W | |
| 2 | Power handling, long term, IEC 268-5, 6 kHz @ 12dB/oct. | W | |
| 2 | Power handling, continuous, IEC 268-5, 6 kHz @ 12dB/oct. | 60 | W |
| Effective radiating area, Sd | 2.1 | cm2 | |
| 3, 4, 6 | Resonance frequency (free air, no baffle), Fs | 1.3 | kHz |
| Moving mass, incl. air (free air, no baffle), Mms | 0.12 | g | |
| 3 | Force factor, Bxl | 0.71 | - |
| 3, 4, 6 | Suspension compliance, Cms | 0.13 | mm/N |
| 3, 4, 6 | Equivalent air volume, Vas | 0.81 | ml |
| 3, 4, 6 | Mechanical resistance, Rms | 0.57 | Ns/m |
| 3, 4, 6 | Mechanical Q, Qms | 1.7 | - |
| 3, 4, 6 | Electrical Q, Qes | 5.3 | - |
| 3, 4, 6 | Total Q, Qts | 1.29 | - |
| 4 | Voice coil resistance, RDC | 2.9 | Ohm |
| 5 | Voice coil inductance, Le (measured at 20 kHz) | 17 | uH |
| Voice coil inside diameter | 13 | mm | |
| Voice coil winding height | 1.4 | mm | |
| Air gap height | 4 | mm | |
| Theoretical linear motor stroke, Xmax | ±0.3 | mm | |
| Magnet weight | g | ||
| Total unit net weight excl. packaging | 0.03 | kg | |
| 3, 4, 5 | Krm | 5.8 | mOhm |
| 3, 4, 5 | Erm | 0.39 | - |
| 3, 4, 5 | Kxm | ∞ | mH |
| 3, 4, 5 | Exm | 0.00 | - |
Note 2 Tested in free air (no cabinet, 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 Measured before burn in. The unit is not burned in before shipping.
Driver Nominal Dimensions
Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)
Terminal Nominal Dimensions
Loudspeaker Driver Terminal Dimensions and Measurements - all dimensions in mm (approx.)
Thickness, both terminals: 0.5 mm
Terminal plating: Gold