Page 1
In this chain you can use any preamp, it could be a one-channel as well as a multi-channel preamp. Meaning the AMT products, you can choose from: One-channel preamps: AMT LA-1 series; AMT Bricks series (these preamps have Bypass modes and they can be chained in series); Two-channels preamps: AMT LA-2 series;...
Page 2
The U2 Pre/Post FX firmware has a special mode that lets to use two AMT Bricks preamps in the chain. In this mode, you just select a preamp by pressing on its footswitch, the other preamp goes into the bypass mode, and simultaneously a preset in the U2 is being changed. The U2 footswitch can be used to turn on/off the U2 controllers.