LL1578XL Microphone Input Transformer, Line-box Transformer

The LL1578 and the LL1578XL are high performance microphone input transformers/line-box transformers with high
permeability mu-metal cores and high bandwidth coils. The LL1578 and the LL1578XL use the same pin-out as our
well known microphone transformer LL1538.
In the LL1578XL the core is about 45% larger than in the LL1578, resulting in a higher signal level capability. In both
types, primary and secondary windings are separated by electrostatic shields. The very low leakage inductance and
thus excellent frequency response is achieved by a two-coil, three-section per coil winding structure.
The transformers are encapsulated in mu-metal cases