The PSU-1250 features a 7-Transformer design, with 4 transformers dedicated exclusively to the power supply stage, of which one for the galvanic insulation of the audio stage, and 3 dedicated to the Dual Choke Inductive Filter.
The PSU-1000 is powered by a 5-Transformers design, leveraging 4 transformers for the power supply stage and galvanic insulation and one for the Dual Choke Inductive Filter.