Question Which additional cab can I connect to my BG250-208  Answer The amp accepts loads down to 4 Ohm - The internal cab is 8 Ohm, so you can add a 8 Ohm cab You can connect one of the TC Electronic RS cabs or BC cabs  that has an impedance of 8 Ohm: 
  • RS112, RS210, RS212 and RS410
  • BC210, BC212
It is not possible to connect the BC410 which has a 4 ohm impedance while keeping the 208 internal cab connected -If you disconnect the internal cab, you can then use the BC410.  You can also use a different brand cab, as long as it has a 8 ohm impedance.