The Canary-II explores the behaviour of the Waveguide at a lower crossover frequency. Instead of crossing at 2.5kHz, the revised crossover is at 2.0kHz (12dB/oct).

Fig 10 shows the comparative plots of the Raw waveguide (Black trace), the waveguide at 2.5kHz (Red trace) and lastly at the new fc of 2.0kHz (Blue trace). All traces are normalized to the 2.0kHz crossover.

Fig 11 is the Distortion plot of the XT25TG30/Waveguide combo with a 2.0kHz, 12dB/oct filter. Remarkably, there are no signs of induced distortions brought about by the lower fc. The bulk of the distortion originates from 2nd harmonics (Red trace).

Fig 12 is the Frequency Response of the Canary-II. Due to room limitations, measurements below 500Hz should be disregarded.

The Canary-II crosses acoustically at 2.0kHz. Summation is as good as can be in the crossover region.

Fig 13 is the Distortion plot of the Canary-II. The XT25TG30 with the Waveguide is completely clean. The distortion peaks at 1kHz and 1.7kHz are from the Silver Flute W17RC38-08 midwoofer. These distortions are inaudible in music playback.

The Canary-II Impedance and Phase is similar to her predecessor. The minimum impedance is only 8 ohms at about 1.5kHz. Phase angle is within +/- 18° from 200Hz-20kHz. At box port tuning (57Hz), the impedance is 14 ohms with a Phase angle of -9°. The majority of power amplifiers will not encounter any issues driving the Canary-II.