Transformers are designed to work with (after) any type of current-output-type like (step-up turns ratio): ES90x8, AK4499, PCM56/58/63, PCM(DSD)1792/94, PCM1702/04, AD1860/62/65, TDA1540/41, TDA1543/45, CXD2552, DSC/DSC2_DAC_project and others; and voltage-output-type DACs like (turns ratio is 1:1): AK449x, AD1852, CS439x, WM874x and others. The final technical parameters of transformers are determined according to customer requirements. Coils ratio can be from 1:1 to 1:40. WW shipment is included.