Johnk,
Others here are capable of speaking for themselves, so I'll state my experience. My Coincident speaker has a Solen capacitor at the tweeter position. The sound of this stock speaker is very good. Replacing the Solen with the Duelund CAST was such an obvious improvement that there's no need to debate this, it's better!I don't need to reinsert the Solen to be "sure".
Charles,