ITEM NAME:2 Pcs audio transformers 600:600 ohm europe 1:1 EI14 isolation transformer.Model: EI14. AC impedance : EI14 600 : 600 Ohm. inductance : 290mH (Â ±20%). Alternating-current impedance value : 600. DC resistance : 135(Â ±%). secondary coils : 800 turns.