I really need your help because I am in the middle of installing my system.
My Sherbourn PA 7-350 is on a dedicated 220V/30A circuit (as required and mentioned in the PA 7-350 European manual). However, I am faced with a bit of a dilemma: I get voltage fluctuations in the power grid, I am thinking of incorporating a voltage stabilizer to get constant 220V at all times, this will protect the amp and prevent spikes and surges too. The problem I have is that a 20A stabilizer is reasonably priced but a 30A stabilizer is proving to be far too expensive.
I know lab conditions demands proper 30A at 220V for optimal results but will a 20A stabiliser in the mix be sufficient for movies and music considering the fact that I will be using seven 4 ohm speakers ? Will a 20A power stabiliser compromise the performance of the amp ?
I'm sure in real world movie watching and music listening scenarios, the amp would never hit it's max power limit.
It's extremely unlikely that you'll exceed a draw of more than 20 Amps in practice. I have the same amp and mine's on a 15 Amp circuit. Even at ridiculously large volumes, peak draw hasn't exceeded 15 Amps.
FWIW, most voltage fluctuations will not be a problem as long as they're around 10-15%.
Unless your voltage fluctuations are shutting your amp down or causing crazy dimming of the light bulbs you may not need a stabilizer. If you must use one, I think you'll be fine with a 20 A unit.
Transport: Sony UBP-X700 UHD-Blu ray player spdif PC using Musiland Digital Times WASAPI via BNC connection - DAC: DC-1->XLR XPA-1 , RCA->Basx A-100 CD: Denon DCD 600 PCM 61 DAC. RCA Amp: XPA-1 gen 2 using XLR connections. Speakers: Axiom Audio m80 V3, Sennheisser HD700 headphones. two pairs 12 guage each bi-wire speaker cables per monoblock Headphone amp: Basx A-100 (INCREDIBLE VALUE!!)