For easy serviceability and tweaking, the Purple discrete opamps can be replaced with any standard discrete opamp or a DIP-8 IC. The output amp stages in the Cans are modular, but cannot be replaced with any other opamp.
Discrete signal path
Capable of driving the most demanding phones, down to 50 ohms
10k?Transformer balanced input
Individual channel cuts
Channel sum to mono
Precision matched stereo level control
Current consumption: 70mA