Audio Research 230/240 volts

You will be just fine.

I've recently imported two pieces of ARC equipment from the US (an amp and a preamp) and have had them converted from 120 volts to 230 volts (according to the specs on the transformer)and am running them at 240 volts without any issues. BTW, both of the units use universal transformers so that voltage conversion was simply a very straightforward matter of reconfiguring the wiring on the transformer in each case. I had it done by an audio technician for vey little cost. I suspect all ARC equipment uses universal transformers, so don't believe it if you are told that voltage conversion of ARC equipmnet is going to be an expensive exercise.

This is not exactly true. At least not in all cases. A friend of mine attempted to convert his Ref 2 mk 2 preamp, and it turned out that althought 2 of the transformers were universal, the third wasn't. He had to order a new one.

Roberts1897,

So what models are yours that being converted successfully?
Will all later models than yours be what Elberoth2 said, not universal in one of them...

I am sure a pre amp will be OK. I got into big trouble with my ViVa Solista, I bought in from the states, to the UK. It was easily changed from 110 to European standard 220volts. After it repeatedly blew capacitors and then output tubes. The Italian designer told me that UK 240volts needed new transformers. A year waiting and £800, it works perfectly, but a costly mistake. The problem was the high voltage around 820 volts in the 845 tubes. In the immortal words of Scotty from startreck " they'l no take it captain"