CAN I RUN 50HZ AMP ON 60HZ?

From a safety point of view (damage to the amp or other equipment) the difference between 50 Hz and 60 Hz is not an issue in this situation. Whether or not they will provide the same level of audio quality is another issue. Assuming a properly designed power supply (which is turning the AC into DC regardless of Hz) I wouldn't think that'd be a problem either.

I once brought over my Harmon-Kardon equipment from the US (60 Hz) to Finland (50 Hz) and had no problems once I used a step down transformer. The difference between the frequencies is most important for equipment with synchronous motors, such as in some turntables, etc. But you should obviously check with the manufacturer for more subtle issues.

I have not had any problems in the US running a 220 Watt per channel power amp and preamp (designed for 50 Hz 220 V)with a step up transformer.

The current demand will be roughly double what it would normally use at 230 V, which may be higher than is recommended for your home. Check your amperage specifications for your house breaker. Also check what the input power requirements are for the power amp (user manual - how many watts does it consume). Power amps are like toasters or hair driers - they consume oodles of power, so you need to get an appropriately rated transformer and make sure you ground things properly (chassis) to prevent danger of electrocution in the event of malfunction.

Although it worked for me, I would not recommend this approach for saftey reasons. BTW, I have since changed my power amp and got rid of my step up transformer.