Cheers very much for that Halloweenman (and your PM). At least I now know it’s a recognised issue, though it’s going to bump the price up of this used purchase now I guess depending how much Chord decide to charge. A bit confused why Chord acted like this was a unique case when I contacted them last week, if they knew about this issue with the earlier TT models. Oh well, I’ll get mine off to them next week. Weird thing is it doesn't do it directly through headphones, or when plugged into a pre, but only directly into a power amp I get the whistle. Have tried two different power amps now and interconnects. Mine was fairly faint but still audible from the listening position a couple meters away. I’ve been resorting to using the physical volume control on TT as the display doesn’t light up them. Fingers crossed they can repair it quickly and it won’t cost an arm and a leg! Despite this issue, it’s so good to have a TT back in the system again - it’s my favourite DAC of theirs (though have yet to hear Dave!).