Adding a cab output to a combo amp?

[monkee13]

The other guitarist in my band has a fender fm212 combo. It's nice but not loud enough. He has a 16ohm Ampeg 4x12 cab. The fender does not have a speaker extension output on it. How hard or is it even possible to add a speaker output jack to this amp? It's a 100watt amp solid state and I'm running an old peavey 100 all tube and we have a LOUD AS HELL drummer, I can cut through and be heard over the drums (at maybe 4 on the post) but he has a hard time being heard and he is cranked up pretty high.
Any help on what we can do (with his amp) would be great. I know everyone is going to come back and say he should just get a tube amp. Thats not an option we are old broke punks that can sling a soldering iron better than shelling out cash. Help...... Please......

[rockon1]

Seeing as its a SS amp it wont put out its max rated power into the 16 ohm cab. It gets max output at 4 ohms. Now if you rewire the cab for 4 ohm's you would at least get the benefit of its 100watt rated output. Then you could rig up a switched jack or something to its output and use the cab. You cant run both the cab and internal speakers though as that would overload the amp. Bob

[Ronsonic]

My experience with the FM212 is that we don't want, in any way, to compromise the integrity of the amp or the warranty status. My experience isn't typical, I only see the broke ones, but the broke ones are broke bad and they don't fix well. These are from the lower end of the Fender line, figure "FM" stands for "Frontman" except for being a really big and loud one. FMIC does not generally authorize field repair for this model under warranty, they are simply replaced and shipped back. That should be telling us something.

No matter what you do to the amp, your problem is still the drummer.