Well the SBooster is a good tip…thanks.My Mutec was bought off eByGum with stock SMPS removed and an ungainly wire with 3.5mm (I think) plug hanging out of the hole where the IEC inlet would have been ie. wouldn’t have worked without an external psu of some sort, which it so happens was exactly what I wanted = LPSU ready.
I use an SBooster which was the best of a handful Fourlegs and I tried in a Chord Hugo. Obviously can’t say it made a difference as I didn’t have a stock Mutec to compare it with! Hope this helps