LCA2B has been upgraded to LCA2B, please check it out, It's GREAT!
We have terminated production of the classic MP1A. Only because we have improved it! The new model is the TUBE-TEC MP2A.
The SSA2A has been upgraded to SSA2B, featuring 4 extra inputs, switchable to mono.
Tube-Tech PA6 Headphone Amplifier, unfortunately not in production anymore. Not enough quality hungry customers.