Voltage conversion from 220V to 110V.

Jea48...Why would heat be different for 50Hz and 60Hz AC power? Both would have the same RMS value.

I think that 50 Hz would theoretically require more capacitance in the power supply filter, because the ripple would be at a lower frequency. But I bet the difference is trivial.

dont worry about the cycle with the amp. is very important for digital(home theater only) not for analogue.

As stated above 220V is cleaner(less noise) than 110V.
The 220V lines are balanced and each of the two hot lines cancel the other one noise. My system was changed(Linn) was
changed from to 110V to 220V, by means of a switch at the back of each unit, I highly recommend the voltage change.
The sound improvement was noticeable. Hector.

Heres the specs from the unit as per their website......I dont see where it mentions the cycle. These are tube mono blocks. I would end up running a seperate line just for the amps because the rest of my system is 100V.

Output: 50W x 2
Output impedance: 4 Ohms, 8 Ohms
Distortion: <= 1%
Frequency Response: 18Hz-30KHz +/- 0.5db
S/N: >=95db
Input Sensitivity: 550mv
Tube types: EL34 x2/ 6N8P (6SN7) x1/ 6N9P (6SL7) x1
Measurements: 460 x 204 x 188 mm
Weight: 16 Kg x2 (gross weight: 19 kg x2)
Power supply: 220-230V

I dont think there is something as simple as a switch or pin the change it otherwise the seller would mention how easy it is to switch since this seems to be affecting his selling price.