The horns are not the culprit, IMO, it's in your using them with a SS amp that is making them sound harsh! Using Klipsch horn speakers with SS components is an outright waste of a wonderful set of horns, IMO! Anyone who tells you otherwise has likely not listened to them with good tubes, or is mostly deaf from having listened to them primarily with SS!! Replace the amp with some good tubes and you will likely hear magic coming from those boxes (I'm assuming they are vintage Klipsch by your other gear - if they are modern a Klipsch design all bets are off, and as far as I'm concerned they'd have a better use as flower pot planters by removing the drivers and turning them on their sides)! I mean no offense to your Hafler amp, by the way. I'm sure it goes well with other speakers, but I'd bet you'd find those horns much more pleasing if you tried out a good tube amp with your system.
If your Klipsch are an older vintage with metal horns, you may want to try applying Dynamat damping material to the outsides of the horns. You can find instructions and opinions on doing just that on AudioAsylum as well as on the Klipsh forum site. But before you resort to that try swapping out the SS with a tube amp. If you can borrow one from a friend, or a generous dealer, take the time to do that just to hear the difference it can make. I'd bet you'd be amazed.
My very opinionated .02 cents!
PS I own a pair of LaScalas and a pair of Heresys, and have also owned two pairs of Forte II's...all are wonderful speakers! The LaScalas I currently own are damped with Dynamat on the midrange and tweeter horns and sound wonderful! With 8 watts of SET power they get louder than I'd ever want them to be while retaining clarity, musicality and dynamics and an amazing soundstage.
PPS That Marantz CD67SE is a shockingly good player for not much money. Yes, there is plenty out there that will outperform it these days, and the sound of digital has much improved since then, but it still remains a great audio bargain in its own right, and is a very musical player. I owned one for five years. It most certainly is an entry-level component, but if your problem is quite severe with listenablility/harshness, I'd doubt it was primarily in that component either.
Good luck!!
If your Klipsch are an older vintage with metal horns, you may want to try applying Dynamat damping material to the outsides of the horns. You can find instructions and opinions on doing just that on AudioAsylum as well as on the Klipsh forum site. But before you resort to that try swapping out the SS with a tube amp. If you can borrow one from a friend, or a generous dealer, take the time to do that just to hear the difference it can make. I'd bet you'd be amazed.
My very opinionated .02 cents!
PS I own a pair of LaScalas and a pair of Heresys, and have also owned two pairs of Forte II's...all are wonderful speakers! The LaScalas I currently own are damped with Dynamat on the midrange and tweeter horns and sound wonderful! With 8 watts of SET power they get louder than I'd ever want them to be while retaining clarity, musicality and dynamics and an amazing soundstage.
PPS That Marantz CD67SE is a shockingly good player for not much money. Yes, there is plenty out there that will outperform it these days, and the sound of digital has much improved since then, but it still remains a great audio bargain in its own right, and is a very musical player. I owned one for five years. It most certainly is an entry-level component, but if your problem is quite severe with listenablility/harshness, I'd doubt it was primarily in that component either.
Good luck!!