NOT KNOWN DETAILS ABOUT TRANSFORMER 230V TO 24V

will they be as dependable and as pure as feeding essentially 220v towards the amps? thanks and sorry if I look like trolling Using these 'my dad's buying me a chinese amp!' threads but Here is the only working day he can do that cuz of his schedule and also the window of time is closing...Tend not to be discouraged if you see that a transformer is