OK, its a bit complex, but here goes,
Left rack -
1. Sound Sculpture Switchblade Gl. ( matrix routing loop switcher and line mixer)
2. Mesa Studio Preamp.
3. Engl E580 Preamp.
4. ADA MP1 Preamp (3 tube mod)
5. Randall RM4 Preamp (input bias mod)
6. Mesa TriAxis Preamp
7. Mesa Two-Nintey...