The Kappa is about 1/3 the weight and 1/2 the cost of the ElectroVoice, but my concern is mostly with the performance differences each speaker will offer. The amp is an SVT. The new TL606s selling for about 2G thru EV are loaded with two EVX-155s. This is why I'm considering one in a single TL606. Any information is much appreciated! Thx!