These are awesome sounding germanium preamps with the highly desired UTC transformers. The price includes them getting modded with modern features added but not affecting the original circuit in any way. External power supply that powers both preamps. Feel free to ask me any questions. The item "PAIR Scully 280 Germanium preamps heavily modded with PSU UTC xfmr vintage 60's" is in sale since Tuesday, February 21, 2017.This item is in the category "Musical Instruments & Gear\Pro Audio Equipment\Preamps & Channel Strips". The seller is "wundershunmusic" and is located in Portland, Oregon. This item can be shipped to United States, all countries in Europe, all countries in continental Asia, Canada, Australia.