A. you - an ordinary person will not get anything at all - you need a professional piano tuner ...
B. since you practically do not have the ability to change the system (equalizers are rarely used by manufacturers - it is not profitable for manufacturers to give the layman a key with which most systems can be configured and DO NOT NEED TO BUY other amplifiers, players, speakers, wires) ... just listen to what you like best) ))
Brodman - plays the piano perfectly ... but it's expensive and usually plays other music in the middle ...