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Measurements:

The modeled response looks pretty decent considering the minimal crossover. As expected for a first order crossover, but not shown, the drivers are in
phase quadrature.
And the measured system impedance:
The actual measured response:
Here is the measured curve family for the Halcyon system measured every 15 degrees from 0 degrees (blk) to 90 degrees (green) Here the off axis
performance of the Alpair 10P really shines. Truly excellent off axis response.
HD plots at 2.8v excitation and 8.0 volts. Again pretty superlative performance by the drivers. Pretty much below 0.3% at any reasonable listening level, and
creeps up to 1.0% levels at the higher excitation, but it is almost all the more benign 2nd harmonic.
Links to:

Main / Design Goals

Driver Selection

Cabinet Construction

Crossover Design

Measurements

Listening Impressions


A FULL RANGE PROJECT
WITH BASS ASSIST AND
COHERENT SOUND
CSD and ETC plots: Certainly quite acceptable considering the 'tweeter' is a 6" driver. The residual energy gets well down in level fairly quickly.
The
Halcyon