DR-880: Recommended Footswitches April 13, 2023 01:37 Updated Follow BOSS FS-5U. BOSS FS-6. Related articles DR-880: External Footswitch Functions BOSS FOOT SWITCH PEDALS: FS-5U, FS-5L, FS-6 and FS-7 DR-880: Specifications AD-10: How to Connect FS-6 for Input Selection KATANA-Artist MkII HEAD: I have connected two cabinets and only hear a mono signal, although I have set the EXPAND switch to Stereo