Dayton Audio ND25FW-4 1" Soft Dome Tweeter with Waveguide - 4 Ohm nominal

Half-Space measurements taken on my turntable mounted IEC Style Baffle jig.

The On/Off axis measurements were taken at 1v / 50cm (equivalent to 2v/1m or 1w/1m nominal).  

Distortion measurements taken at 20cm - level specified in measurements

Frequency response measurements are gated at 6ms.  Smoothing applied is 1/48th octave.