Hi G, An el-84 amp is kind of like a Decware SET isn't it? ( either el-84 or sv-83) These 2 watt amp types are very sensitive to speaker loading as they really prefer woofers with low Z-max specs. That's why Wayne developed the "Thermonic Series". The only other choice IMHO is a "Theater Series" model 4 Pi or 7 Pi. They both use Eminence Delta 15 woofers, which are quite tube friendly. You can also use large SS amps with them when you want to scare the neighbors. (just kidding) The advice to get out the tape measure is really good. These are mostly large speakers. They are excellent performers though. Take care, Steve