Cornwall iv

Yes 60hz is probably good. Honestly most speakers start rolling down at 60hz and then they “crossover” with the port. I find speakers sound better if I crossover where the bass driver rolls down before the port is engaged. That has been my experience with a number of speakers.

the big 15” woofers with accordion surrounds are very good in the mid bass because they settle fast and have a ton of surface area but deep bass is not their strong-suit due to low travel.

JL is good about fixing subs ($550 for full rebuild out of warranty) but this is my 5th failure (4 prior rebuilds, 2 per sub) so I am done and moving on to another brand. 

Nice, Enjoy the time with the kids, they get big fast. Mine are in 1st grade and preschool.

I have not see detailed measurements of the Cornwall IV but here you can see the measurements of the Forte IV which might give you some insight. 
 

https://www.erinsaudiocorner.com/loudspeakers/klipsch_forte_iv/

Mofojo,

yeah the measurements are ok on the forte, watch the video for good explanation. The general frequency slope is fine. You would have to play with toe to get the highs where you want them which can easily be done with horns. When I demoed them I felt they lacked bass. You can see that in the measurements with the bass shelf (downward). These are clearly tuned to be placed 1-2’ from the wall. I heard them out into the room 4’ or so. With a good set of subs they are probably fine. The mids were nice. The only other thing is you can see the resonances in the speaker (peaks up and down) but those are probably different in the Cornwall… 
 

the Cornwall IV was a big step up to my ear with deeper more textured bass and I felt they had better driver integration from low mid to mid. 
 

as a whole I think Klispch are ok speakers. They have good dynamics which is very hard to find in cheaper speakers as dynamics normally come with efficiency and efficiency comes with size or the cost of bass extension. What they lack is refinement, refinement of ultra smooth frequency, low box noise and a smoother off axis response. So I think it comes down to what you value. I put dynamics at the top of my list and if you have never used horns you will quickly see the advantages. Sadly I think speakers that are as dynamic with more refinement will cost a lot more (JBL, maybe Volti). 
 

I ended up buying the JBL 4367 over the Cornwall (bought a few things in between too lol….). The 4367 is similar in size to the Cornwall but has much better drivers and box (thicker more solid horn too) but with that and the JBL name comes much higher cost (3x!). As a whole package the JBL keep the dynamics but add audiophile refinement over the Klispch to my ear and in the measurements (4367 measurements on Erin’s audio corner). 
 

as for Klipsch, I think I would take the Forte with subs over the Cornwall without subs. But I would take the Cornwall with subs over the forte with subs… subs for the win, always subs lol. 
 

the La scala is well worth a try, a local pair on Facebook was listed for $7500 (awesome deal). I kind of wanted to buy them just to try it, but they sold as thought about it. The La Scala bass extension is very poor and subs are a must IMO. I felt like the horn loaded bass was a step up in dynamics over the Cornwall. Though I did feel like I heard a bit of the cabinet, could have just been in my head though, Hard to say. 

Hilde45,

I really can’t say anything about the power amps. When I demoed the Cornwall IV it was using a MAC7200 oddly the same setup at two different shops. I don’t remember what the forte was using as I was really shopping the Cornwall/La Scala.

when I demoed the La Scala (current model) I heard it on the MAC7200 and MC275 in the same room as the Cornwall IV. The tube sound was very noticeable in back to back A/B but the MC275 is a pretty high power tube amp with way more than enough power, which still had good dynamics. I stay away from tubes because I hate buying them and worrying about their life, I like the sound though.

it was just demos, so only a few hours, longterm users can give you more insight for sure. I did listen to the systems a number of times as it is my local shop I normally buy from. We moved the Cornwalls all around the room, close to the wall, well into the room, in the corners, etc, I like the typical audiophile isosceles triangle setup the best, toed towards the shoulders. 

To be fair the OP is looking at used Cornwalls IV which is what $4k ish?  In that price range I would personally buy the Cornwall and be happy. I think it is far less of a risk than Tekton which would be much harder to resell. My general thought is that used Cornwalls are a cheap way to get big speaker dynamics without spending big speaker money. 
 

say the other side of the coin, something like the Revel 228be (used pairs for $5500-$6500 right now). I have owned this speaker and it is super refined, commit no sin type of refinement. Without subs they are pretty light in their bass tuning and are a touch boring (great with subs) but “perfect” sounding. Oddly I sold my 228be to someone local that owned a pair of Tektons (pendragon I think) and after a few weeks he more or less said the Revel eclipsed the Tekton in every way including bass impact and detail. I think he was a bit taken back with how good the Revel really was. Having it in your home is a lot different then a demo. 
 

I bring up the 228be because I owned them while shopping for horn speakers. I think living with a very refined speaker makes warts of other systems stick out pretty quickly. my local shop also has the Revel line (328be, Salon) and Klispch line (Cornwall, La Scala) on the floor for easy comparisons. 

So it just comes down to what you value most. With money you can have it all but most of us need to chose our priorities. I think the Cornwall is an ok compromise if you put dynamics at the top in that $5000 price range.

Mofojo,

I am glad you like them. They are en enjoyable speaker and “audiophile” enough IMO. I think the Chorus line is pretty bad (I have owned some). As I was trying to say about the Cornwalls is they are pretty good and speakers that have the same type of dynamics but are more refined come at much higher price. Dynamics are so important I would take them over the last bit of refinement. 
 

I will be interested to hear what you think with the subs and how you set them up (highpass?), Lyngdorf is a nice piece. 

Interesting on the room correction, not sure what to think there and why it would be different than other speakers. You might get less room reflections with the horns. They tend to be a lot more narrow and need less room treatment/correction in my experience.  
 

Does room correction need to be engaged to run a highpass? Even if you chose to highpass at 40hz I would imagine the transition will be clearer. 
 

I normally highpass my JBL 4367 (similar layout to the Cornwall) at 63hz but one of my subs is broken again (JL is trash). So I am running just one sub at 37hz to fill in the bottom end at the moment. Even at 37hz the highpass made a big improvement in integration than just using a a low pass (I tried both ways), food for thought. 

Mofojo,

that is good to hear. Does it show you the changes it makes before and after running the correction? Do you allow full bandwidth correction or limit it to a frequency (say 200hz and lower)?