Used for setting up headphone cues or sending signals to outboard reverb/delay units.
Given the rarity, where should you look? Amek 501 Langley Manual
In many enthusiast circles, the "Langley" version is far more desirable. Consequently, the manual for the Langley-equipped version is distinct from the standard 501. It contains critical pin-out diagrams and specifications for those proprietary transformer stages, as well as calibration instructions for the Langley EQ sections. Used for setting up headphone cues or sending