The Pass is terrific. You can set it by ear and forget it. You won't obtain the best results that way. I couldn't get it sounding exactly the way I wanted. I found with any crossover it's helpful to have some kind of measurement capability especially with amps of different sensitivities (but even if they're all the same I'd still do this). I use a function generator (I bought used off eBay) as a pre-amp input outputting different frequencies. I measure and match R & L amp outputs with a digital volt meter to within a millivolt, and then measure the overall room response with the DSpeaker 2.0 Antimode Dual Core to make sure the gain settings are right. It may sound complicated, but it's doesn't take long, and you get perfectly balanced results - a better soundstage and a very centered vocal image.
I know of the Magtech but never heard one.
