We’re off to a week long holiday tomorrow so I turned OFF my Nait 5si. I did notice that the thump was only on 1 channel. Curious, I turned it ON (with turn ON thumps on both channels) and played music for around an hour. Seems everything is fine. I turned it OFF again and confirmed that the thump was only on one channel. Wondering if this is normal since as far as I know, turn OFF thumps should also be on both channels.
The Nait 5si is around 3 years old and I really don’t know if it was really like this since I got it brand new. I think I’ve only turned this OFF 3 times since I got it.
I have active speakers in my main system and get a thump/pop when I turn them off. According to ATC this is completely normal and I don’t worry about it, but the thump is much louder on one speaker than the other.
If your system sounds good and you don’t have any channel balance issues, I wouldn’t worry.
It’s interesting to read that: my Atom HE goes into standby after 20 minutes and I don’t get a sound from my active PMCs, and nor do they make a sound when switched on or off.
Back to the OP’s question - do t worry about it. It plays music happily, so it’s fine.
Interesting. I do get a soft pop (definitely a “pop” rather than a thump) when switching off my little active AE1s. I wonder if your PMCs include relays to disconnect the speakers before capacitors discharge, which I believe is a way of avoiding thumps.
In my previous life in the “space industry”, we had (for several decades) required our equipment suppliers to meet our “inrush current specification” - the classic “switch on thump”.
Latterly we started to look at “outrush current”, as we learned that switching off an equipment would produce another current transient as the larger caps discharged - for sure, smaller than inrush transients, but nonetheless significant.
So a “pop” on switch off could be expected, and indeed both our Meridian 1500 subwoofers exhibit this behaviour on “power down”.
