Can i use two EI transformer instead of one toroidal transformer?

Yes, either will work purely from a voltage/current perspective. Keep in mind though that the advantages of the toroidal are size, radiated field, and noise, all somewhat important in an audio system. Good luck!

confident you need to use the place as your load is often related or no longer bypass to very low point.comparable technique is utilized in Breakers with out any exterior ability,the present out placed one CT, are used & Voltage out placed(yet another transformers) used for secure practices equipment (enjoying cards) & used with Magnetic trip solenoid.this form of equipment will paintings positive with over load secure practices equipment.those technique utilized in the previous via M/s Siemens >40years till now.I used comparable technique for measurement of very low cutting-edge & sensor circuit used for some spl.trip Relays, for the period of college days,