Source
The Source stage is the first in the chain. Its SOURCE tab holds the POSITION card; its tone controls (Warmth, Brightness, Presence) sit on the Tone tab with the other pre-reverb tone controls and follow this stage’s MIX, BYPASS and SOLO.POSITION
Both controls act on the source as it enters ANTIVERB: on the dry signal that the master DRY / WET blends back in and on the signal every reverb stage hears, so they work at any DRY / WET and whatever the Source MIX. A farther source makes the reverb quieter and darker along with the dry. They stay active while another stage is soloed; the Source BYPASS turns them off.