It doesn't work that way, speaker cabs have an RMS power handling rating based on the thermal limits of the voice coil. Has nothing to do with anything else. Those TE cabs would've worked out well. But, so will the GK cab you ordered. Only with a 4 ohm cab, you're unable to "add-on" another cab if you need more volume down the road. Also, in one previous post, you mmentioned "the deep low end of a 15", and that's also a fallacy. Deep low end can come from ANY size driver, it's the cabinet tuning that matters in that rguard. Good luck with your new rig, and have fun.
