As you rightly indicated DONT use the Light and El Cheapo Thyristor based 220 VAC to 110 VAC adaptors.

They can be easily identified.... they weigh next to Nothing.

They produce so many Harmonics that your transformers ( inside each Hi Fi product ) will usually over heat & smoke.

That's in Addition to the lousy sound ...

Take Care... Use the ones that are " As Heavy As A Chevy "

Can any of your gear be converted to 220 before you leave. I doubt that this will be as cheap as an adapter, but it might be more effective.

you cannot convert the local 220V in the UK, you must adapt YOUR 125V stuff to their system. Words in certain arrangments mean things. Is their stuff 50Hz or 60Hz over there. Driving on the wrong side of the road is fun. ooops, crash!!!! and then there is that Queen thing, with the HAT. ooooh, my what a lovely thing you have hanging off teh brim, queenie.

I guessed by now you have moved already...
But one tip is a PS Audio PSU. They all have a switch inside, that switches their input voltage from 110 to 230. At the output they still generate whatever you set on the display, i.e. 110V.
Their is no impact by the frequency change from 60 to 50 Hz except on a synchronous record player motor... Anyway, on the PS Audio you can chose the frequency...
By the way, UK is on 240V... Europe on 230V. 220V was a long time ago...
Cheers,
Arthur

any magic power cords for 220V, 230V 240V..or is magic only done at 125v in the U.S.? Do the magic power cord makers just change teh stickers? Like directional arrows on the other magic "directional" piecs of wires. In Australia, are the arrows reversed, they are in a different hemisphere, don't toilets flush the other way too? In bizzaro world in superman comics, do the arrows mean the opposite of what they are indicatted, with Mr. Myxbliskpliish, being the head audio guru. Or is Bizzro world here in the land of the non Bizzaro World, or is it?