I was wondering how to push more than one cab with a head that only has 2 1/4" outputs. I heard that you can link several cabs somehow.
Speaker cabinets usually have 2 jacks on the back. You connect one cable from the amp to the first cab, then another cable from the second jack on the first cab to the second cab. You need to know the impedence of both cabinets and the minimum load that your amp will handle before you do this, though. 2 8 ohm cabs will produce a 4 ohm load, and pretty much any amp will be OK with that. 2 4 ohm cabs will produce a 2 ohm load, and some amps aren't OK with that. Until your pretty familiar with series and parallel wiring schemes and with calculating impedance, I wouldn't try connecting more than 2 cabs to a single amp at one time. If you string together a <2 ohm load you're gonna fry an amp in a hurry.