You don’t need a load on solid state amps!

     Leaving a SS amp turned on, 24/7/365, keeps it warmed up and sounding it’s best (circuits are energized). 

     SS amps are typically safe to turn/leave on, without a load.

     Given those two observations: it should benefit/can’t hurt.

 

Burning in question

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I bought an NAD M33 for a system in a 2nd home. I want to run it in before installing and these amps are notorious for needing a lot of time before sounding as designed.

For burn-in you need current traveling through circuit electronic components to burn them in.

You will need to feed the inputs with a music signal source.

You will need a load connected to the outputs on the amp. You could probably use a dummy load. An 8 ohm resistor connected to each channel output. Wattage? Depends on how hard you drive the amp. I would think a moderate level would be enough. I have always just used the speakers for burn-in.

I see on Ebay 50 and 100 watt 8 ohm resistors are pretty cheap.

Hopefully some one will chime in for the wattage needed.

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I just remembered that my Audio Research Ref 5SE used to require music being run through it for 10 - 15 minutes every time… even if it was powered on for an hour or two. Then it would sound notably better. Not a click and instantly sounded better… but over say 30 seconds every time. I thought I was crazy… I posted to a high end audio forum where lots of folks owned these and got many replies that They heard it also and it was a known thing… Happily, I just realized it does not happen with my REF 6SE.

So, I am thinking that is somewhat indirect evidence that initial breakin requires something flowing through it. Try lamp-cord… or cut up an extension cord to get around the ribbon cable issue.