DavesAudio

You would think so, but apparently not! Complaints about harshness of these tweeters are reported by so many, it's obviously an issue. When I got mine, the first time I played them at a serious volume, it was noticeable right away, which is why I found this thread after a google search for "Klipsch RF-7 mods." I called a friend who mentioned that warmer sounding amplifiers, especially tubes, sound much better on these. I saw a youtube video of an even lower tier product line (RP-8000F) that had a huge suckout at the crossover region so there's a lot that can be missed for the lower tier product lines (see THIS VIDEO). .

This is an old post; however, I have some detail to add about the ports. Their lengths are critical to the design of the loudspeaker itself. It's a little more complex than simply a longer tube determines how low it can go. It is true the the longer the port, the lower its (that is, the port tube itself) resonant frequency is (see https://en.wikipedia.org/wiki/Resonance). However, that resonant frequency is also crucial to the design of the system as a whole, and should not be changed, because it would then require a change in something else in that system. Its length is by design, to match everything else in the sytem: the volume of the enclosure, the Thiel paramaters of the woofers themselves (see https://en.wikipedia.org/wiki/Thiele/Small_parameters) and the crossovers: the electronic components that split the signal coming from the amplifier into the high and low frequencies, so that on they go to the tweeter and woofers respectively. With loudspeakers, all of the impedances: both mechanical and electrical have to be considered in the overall design. This is was makes loudspeaker design a significant engineering challenge.

Hi Youthman! What has been your impression of this amp now that some time has passed? I also sent a PM.. I see you are fairly local to me. I am in Pinellas County. -Dave