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These compact units feature Neodymium magnets, ferrofluid and are incredibly rare. The 25mm woven textile dome is moderately horn loaded resulting in a good efficiency of 92dB.
As to be expected from legendary maker Audax, these sound superb.
These long discontinued tweeters are in factory fresh condition & test perfectly to specification ~ they are probably the only ones available anywhere.
Faceplate diameter: 70mm.
Cabinet cutout: 50mm.
Voice coil diameter: 25mm.
Nominal power: 70 Watts.
Impedance: 8 Ohms.
Resonant frequency: 1020Hz.
Frequency range: 3kHz-20kHz.