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User Review: T 777 A/V Surround Sound Receiver - Initially great sound but when you increase the volume, it switches itself off.

August 26, 2012

Products: T 777 A/V Surround Sound Receiver

I first bought the T757 but this unit started switching off when asked to play music and movies through my Martin Logan Theos mains and FX2 surrounds. I contacted NAD and they suggested a more powerful model. Enter the T777 and lots more money. Guess what? This unit does the same. As soon as you play music or movies for a while, it also switches itself off. In selecting this unit, I spoke with NAD Tech support - what nice people! They also suggested a C275BEE power amp, which in hindsight might have been the better option with the T757. Perhaps the automatic circuit breaker is malfunctioning, causing the unit to switch off. I don't think lack of power is the issue because my Bryston B-60 (60 watts per channel) runs the Theos beautifully without strain or switching itself off. It could also be that NAD doesn't like 4 ohm speakers despite the 4 ohm dynamics power rating of 260 watts per channel (stereo). I will work out a solution with NAD, but take care with the T757 and T777 when matching them with certain speakers. If these NAD receivers didn't sound so good, I would try something else...

edwinr - Australia

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