22mm TW022WA04 Neodymium Dome 4 Ohm

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Code: Wavecor-Tweeter-TW022WA04-01

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$110.00 per pair

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Description: 22mm TW022WA04 Neodymium Dome 4 Ohm

Wavecor Speaker Driver - TW022WA04 - 22mm Neodymium Cambered Textile Tweeter- 4 Ohm

Description
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 ¾” tweeters and those, where 1” tweeters would usually be used. Featured with a rear chamber these compact tweeters offer very low resonance frequency. In order to keep distortion and resonance frequency low the TW022WA04 is designed around an external neodymium ring magnet in order to allow for a larger internal volume than that of traditional neodymium tweeters. 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.

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
Optimised 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 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	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, 3.0 kHz @ 12dB/oct.		W
2	Power handling, long term, IEC 268-5, 3.0 kHz @ 12dB/oct.		W
2	Power handling, continuous, IEC 268-5, 3.0 kHz @ 12dB/oct.		W
6	Effective radiating area, Sd	6.1	cm²
3, 4	Resonance frequency (free air, no baffle), Fs	825	kHz
7	Moving mass, incl. air (free air, no baffle), Mms	0.26	g
3	Force factor, Bxl	1.6	-
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	uH
	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	0.6	kg
3, 5	Krm	3.2	mOhm
3, 5	Erm	1.12	-
3, 5	Kxm	3.1	mH
3, 5	Exm	0.56	-

Note 1: Measured in infinite baffle.
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°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, involving parameters Krm, Erm, Kxm, and Exm.
Note 6: Measured before burn in. The unit is not burned in before shipping.
Note 7: Determined by physical weighing of the moving parts including the inner half of the surround.

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