Dear Keith:
The darTZeel integrated was subject to a full review by Stereophile - here is the link: http://www.stereophile.com/integratedamps/dartzeel_cth-8550_integrated_amplifier/index.html
The Sasha was also reviewed by Stereophile and subject to Atkinson's normal suite of measurements - its impedance characteristics are well known:http://www.stereophile.com/content/wilson-audio-sasha-wp-loudspeaker-measurements
In fact, all of the WattPuppies, and most other Wilsons, drop to or below 3 Ohms in the bass and feature moderately steep phase angles.
The darTZeel integrated was subject to a full review by Stereophile - here is the link: http://www.stereophile.com/integratedamps/dartzeel_cth-8550_integrated_amplifier/index.html
The Sasha was also reviewed by Stereophile and subject to Atkinson's normal suite of measurements - its impedance characteristics are well known:http://www.stereophile.com/content/wilson-audio-sasha-wp-loudspeaker-measurements
In fact, all of the WattPuppies, and most other Wilsons, drop to or below 3 Ohms in the bass and feature moderately steep phase angles.