I was looking to see if my receiver will power speakers and send a pre-out signal at the same time. That’s still unanswered even after emailing NAD but it did find this article on its power output rating. Best $20 I’ve spent in awhile.

hifi-review.com

“The amplifier's power delivery fully lived up to NAD's claims. At a constant 0.1 percent distortion into 8-ohm loads (with both channels driven),the power output was between 48 and 52 watts per channel from 20 Hz to 20 kHz. Under the same conditions into 4 ohms (for which the Model 705 is not specifically rated),the power ranged between 53 and 55 watts from 20 to 800 Hz, reached 61 watts at 1.2 kHz, dropped to 53 watts from 3 to 8 kHz, and climbed back to 61 watts at 20 kHz. The 1-kHz distortion into 8 ohms at the receiver's rated 40 watts was 0.03 percent in one channel and 0.04 percent in the other.

But where the Model 705 really showed its mettle was in our dynamic power measurements, which use a 20-millisecond 1-kHz tone burst repeated at half-second intervals. Into loads of 8, 4, and 2 ohms, the output clipped at 95, 144, and 263 watts, respectively, easily surpassing NAD's specifications. Very impressive for a "40-watt" amplifier!”

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