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Audax TW025A26

Pair of Audax TW025A26 Tweeters

Audax TW025A26 is a modern high-efficient tweeter, that features a powerful neodymium magnet with a special cast heatsink, which forms a rear chamber too. The textile dome looks like it has no coating at all. The front panel is casted too and  it is shaped as a small waveguide around the dome.

Audax TW025A26 Tweeter Two Versions

They are two versions of this tweeter. The only difference is the protection rod in front of the dome. It doesn't look too efficient and the manufacturer skipped it in later production.

This is the manufacturer's brochure  Link To Audax TW025A26 Manufacturer's Datasheet

Driver Properties Electrical Parameters
Membrane Shape Dome   Nominal Impedance 8 Ω
Membrane Material Textile Rated Power 100W
Surround Textile Sensitivity 94 dB/W/m
Voice Coil Diameter 25mm Recommended Frequency Range 2-40KHz
Magnet System Neodymium DC Resistance 6.1 Ω
Ferrofluid NO Nominal Resonance Frequency 1126 Hz
Front Plate Material Cast alloy   Linear Excursion N/A
Rear Chamber YES Voice coil inductance N/A

Audax TW025A26 Mounting  

Mounting dimensions of Audax TW025A26 tweeter

My Measurements

Audax TW025A26 SPL Responce at 1m on axis and 15 30 deg off axis

Frequency response at 1m with 2.83 V input RED - on axis, BLUE - 15 º off axis, GREEN - 30 º off axis

Audax TW025A26 Second, Third and Fourth Harmonic

The second, third and fourth harmonic curves measured at 0.89V, 2.83V and 8.9V input RMS.

Audax TW025A26 Burst decay Responce

Burst decay response, measured at 1m on axis

Audax TW025A26 Impedence

The impedance curve in 18 ltr sealed box


They are very few dome tweeters, that can be used in a high-sensitivity system and Audax TW025A26 is one of them. It can be applied in two or three way systems in a range above 2 KHz. The higher is the cut-off frequency, the higher is the sensitivity of the whole system that this driver can be used in. If the working range starts from 6KHz, the overall sensitivity is above 96 dB/W/m, which, combining with the excellent high-frequency performance up to 40KHz, makes this driver a good choice for an ambitious multiway system.     

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