Tube amps and low impedances


Audio Research lists its flagship Reference 600 amp at 500 wpc at 16 ohms....Do tube amps double with each halving of impedance as the best solid state amps do?

Model Reference 600MKIII Specifications

POWER OUTPUT: 500 watts continuous at 16 ohms from 20Hz to 20kHz with less than 1% total harmonic distortion (typically less than .05% at 1 watt).
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Showing 3 responses by mitch4t

When a speaker dips to 1 or 2 ohms...does a tube amp such as the ARC 500 wpc model listed above begin to strain?.... or do they hold steady and maintain authority over the speaker?
With impedances that low....would biamping with a SS amp on the bottom and tubes on top relieve the tube amp of the strain?
Please forgive me, but was my question answered about tubes on top and beefy solid state on the bottom in a bi-amped setup work for speakers that are rated at 4 ohms nominal impedance, but will dip to 1 or 2 ohms?