I currently have the KLF-C7 but it's cabinet it way to large to go with my new theater room furniture and setup. I need a replacement that will complement the Legend towers nicely for theater but also be significantly smaller in size. 

 I was thinking a center channel with 5 1/4"  to 6 1/2 " woofers would be an ok size.

Any thoughts?

Run your system in "Phantom" mode - eliminating the center altogether.   As you already know, the Legend match to your 20's is the C7.  If you are running a 7.1 system - you might consider using your C7 as a single rear like a 6.1 setup.  KLF-20 mains on Phantom, surrounds, and C7 as a lone rear.

 That sounds interesting to do without a center channel. I will have to try it to see how it sounds with and without. I havent heard many people do this before.

I think I do want to replace it with another, though. I was thinking the RC-62 since it is a Reference speaker and has larger 6.5" woofers.  I would really consider the RC-64 but they are a bit more than I want to spend for downsizing   :) Would this be an ok match to the KLF-20 fronts?

I really doubt you would like running the KLF-20's without a center channel for home theater.  I recently upgraded to a pair of KLF-20's and I have been using a KSP-C6  as my center (same vintage) and it sounds very good to me in the "timbre match" department. 

If you would be interested in trade, I have both an excellent condition KSP-C6 (6 1/2") or KSF-C5 (6 1/2") that I would be willing to trade plus some extra for your C7.  Both are very close in size and are one step smaller from the C7.  I do not have any space concerns as I recently put in a large projector screen.  Just let me know if you would be interested as both are in excellent condition.

+1 for no center speaker versus a compromised one.  Having a center speaker is not an absolute necessity.

Look up 'timbre matching' and you'll see what we're talking about.  

 Thanks for the input everybody.  I just sold my receiver and my new one doesn't come until next week so I will have to wait to test the Phantom Center channel mode. The replacement will be a Pioneer Elite SC-05.

 I am pretty familiar with timbre matching.  I thought that the RC Series of center channel would still match closely for the KLF's especially the RC-64 which has 4 6.5" woofers.  The specs on the Klipsch website for the RC center channel speakers show they have  amost the same horn driver and actually have greater sonic range than the KLF which has dual 8" drivers. Wouldnt they be an ok fit with the KLF-20's, especially the extra air movement of the 4 6.5" woofers in the RC-64?

 I may consider going with RF-83 fronts down to road to replace the KLF-20's.  These are the factory matches to the RC center speakers. 

 I have to admit that when listening to home theater, I mostly want superb dialog and do not care to much for effects and surround. I do listen to a lot of music through this system in 2.1 mode. 

ezpc:

I am pretty familiar with timbre matching.  I thought that the RC Series of center channel would still match closely for the KLF's especially the RC-64 which has 4 6.5" woofers.  The specs on the Klipsch website for the RC center channel speakers show they have  amost the same horn driver and actually have greater sonic range than the KLF which has dual 8" drivers. Wouldnt they be an ok fit with the KLF-20's, especially the extra air movement of the 4 6.5" woofers in the RC-64?

 I may consider going with RF-83 fronts down to road to replace the KLF-20's.  These are the factory matches to the RC center speakers. 

 I have to admit that when listening to home theater, I mostly want superb dialog and do not care to much for effects and surround. I do listen to a lot of music through this system in 2.1 mode.

Timbre matching really doesn't have anything to do with matching driver size or frequency response as far as there are many speakers that technically have the same specs on paper but will sound completely different in person.  Its about using components that are 'voiced' the same or similarly, use the same material for their drivers (titanium, phenolic, etc) and many other details.

If you are planning on getting RF-83s some day then it wouldn't be too bad of an idea to get the RC-64 as a center speaker.  The RC-64 is HUGE though, so make sure you have room for it where you plan on putting it.  You'll definitely have the vocal clarity you're looking for but when the sound pans back and forth between the front speakers it wouldn't be nearly as seamless as if you had a KLF-C7.

"+1 for no center speaker versus a compromised one.  Having a center speaker is not an absolute necessity."

Your joking on this one right?  Without a center channel you don't have a Home Theater you have a "Stereo"  the center speaker is the most important speaker of the bunch.

The RC-64 will stick out like a sore thumb when placed between a pair of KLF's, get the timbre' matched C7 IT will make a BIG difference in the pans back and forth across the front stage for music and HT.

Mixing and matching won't sound bad but it is FAR better to have the center that is designed and matched to your Mains the improvement will be immediately noticeable.

The issue of no center vs. phantom center is nearly a religious one.  There are ardent adherents on both sides, and much e-blood has been shed here over it.  Both sides agree, however, that a mismatched center sucks.

 Thanks Frzninvt.  I do already have the timbre matched KLF-C7 though.  My issue is that the KLF-C7 is always too tall fo fit where I need it to. I need to downsize the center speaker to fit with my tv stand and furniture. That is the reason I have been looking at the RC-62/RC-64.  I love the way the Legends towers sound, I just need a center speaker with a shorter cabinet that still sounds good with the KLF-20's.

 As I mentioned, I may end up changing over to the RF-83 towers in the future to replace the KLF-20 towers so a future timbre match may be possible.  I am not sure how different the RF is over the KLF being one is a 2 way speaker and the other is a 3 way. I do not want to give up the sound from the KLF towers, though, which I enjoy mostly listening to music. 

OK got it!  It cannot be placed on the floor with the angle pegs in place tilting it towards the listening area?  How about off to the side?  How about on a shelf above the TV?  A swap with the guy that has the KSP-C6 would work but then your back to the non-timbre' match issue.  You need to find a way to integrate it somehow.  I have a La Scala for a center and it certainly presented some challenges with the projection TV I had but works perfectly with my Plasma perched on top of it as a stand.

I have an RC3 ii that I currently use with the KLF 20's. I am looking for a c7. Maybe we could work something out.

Frzninvt:

"+1 for no center speaker versus a compromised one.  Having a center speaker is not an absolute necessity."

Your joking on this one right?  Without a center channel you don't have a Home Theater you have a "Stereo"  the center speaker is the most important speaker of the bunch.

The RC-64 will stick out like a sore thumb when placed between a pair of KLF's, get the timbre' matched C7 IT will make a BIG difference in the pans back and forth across the front stage for music and HT.

Mixing and matching won't sound bad but it is FAR better to have the center that is designed and matched to your Mains the improvement will be immediately noticeable.

I agree that the center speaker is the most important speaker, if you have one.  Its not as if there's no dialogue or sound coming from the middle soundstage of your front speakers if you don't have a center speaker though.  I still believe that using a center speaker that is completely mis-matched to the front mains is much worse than not using one.

I don't use a center speaker.  I had a Quartet center for a few months last year and if I would have kept it I would have had to purchase a completely new TV/component stand which I wasn't ready to do.  I loved how it sounded since it was timbre matched.  If I bought a center speaker smaller than an Academy it would fit with my current TV stand.  I do not want to make that compromise so for now I'm enjoying my 4.1 home theater. 

A home theater system without a center is like a foot without a big toe. 

ezpc:

 Thanks Frzninvt.  I do already have the timbre matched KLF-C7 though.  My issue is that the KLF-C7 is always too tall fo fit where I need it to. I need to downsize the center speaker to fit with my tv stand and furniture. That is the reason I have been looking at the RC-62/RC-64.  I love the way the Legends towers sound, I just need a center speaker with a shorter cabinet that still sounds good with the KLF-20's.

 As I mentioned, I may end up changing over to the RF-83 towers in the future to replace the KLF-20 towers so a future timbre match may be possible.  I am not sure how different the RF is over the KLF being one is a 2 way speaker and the other is a 3 way. I do not want to give up the sound from the KLF towers, though, which I enjoy mostly listening to music. 

Get a properly sized TV stand.