I have a 115 combo and would like to know how can I run a Peavey 210 cab with my 115 combo? Can that work? Can I run it with my 15 not bypassed? Help I dont how this works. The 210s are 4ohm. Thanks for any help. The 115combo 200W @ 4 ohms internal speaker. 300W (2 ohms) when used with 4-ohm external speaker.