I recently purchased a set of Infinity Reference 4x6 plates for the front of my truck, and man they sound good, I had polk 4x6s in there before and the Infinitys kill them in accuracy. I know the ref. line is the low end for Infinity, how much better would a Kappa sound??
Yeah, the Kappas are a much better improvement than References. The Kappa's mid and tweeter is a lot more defined, the Reference series isn't nearly as crisp.