I tried turning off the High Pass Filter and Wholla! I have great midbass up front. I can only think my earlier hypothesis is correct, the crossover settings on my amp are now incorrect due to the 2 ohm Kappas I am using. Hopefully, this info will help remove the label that Infinity Speakers don't have good bass. I giving them 75 watts rms, they can handle over 100, and they sound great. I have bass up front which gives me the balanced sound I like.
I deplore systems with the "subs in the trunk sound".
Crystal clear mids and highs, good tight midbass and a 3 year warranty all for $200.
See my other post for easy door installation. This deal is hard to beat.