So this question probably sounds crazy but: Is there any way to convert a Marantz 2245 which is ONLY rated for 120v @ 60hz to 240v @ 50hz? There is no obvious input power switch. Are the designs of the 2 power supplies completely different? Were there places put on all PCB's to solder in the required components to make a conversion? Thank you.
Check under the hood for a jumper switch. If that's not there, it is wildly impractical. Maybe an external transformer would work better in that case.