110v vintage receiver to 230v US to France step up transformer

Hello everyone.

I have a Marantz 2325 receiver (110v AC), which I am transporting to France.

I understand I will need a step up/down transformer to regulate the 230v local AC, and knowing nothing about these, I am hoping the experts out there can offer some advice / recommendations for a good quality transformer, as there is a wide range it seems.

Obviously I do not want anything that damages the receiver / speakers, or anything that is going to cause audio interference.

Thanks in advance!