Always consult the official Owners Manuals and Guides first.
Information about the FM3 may be incomplete or wrong, it's being worked on.
Quad Chorus block
Available on which products
- Axe-Fx III: no
- FM3: no
- Axe-Fx II: 2 blocks
- AX8: no
- FX8: no
Channels or X/Y switching
- Axe-Fx II: no
The Quad Chorus block uses much more CPU than the regular Chorus block.
Replicating the Quad Chorus on the Axe-Fx III and FM3
"You can use the Multitap block as four choruses." source
Read the Axe-Fx II Owner's Manual.