.  

Graph from Stereophile review measurements.   Link to Forte III https://www.stereophile.com/content/klipsch-forte-iii-loudspeaker-measurements

As you have found low bass missing or greatly reduced in impact and after a while I started noticing the peaks around 150Hz in certain songs.  

The forum is so slow my watch is going backwards to keep up. JJK

^^ THANK YOU!!

The only way to set a large in Audyssey is full range. I prefer not to do that because then it sends all bass to the mains. If I pick lfe plus mains it doesn't sound right. Any other setting is automatically considered small with the option to change the crossovers.  I tried the full range as that's what Denon configured, but it didn't sound right and put my center at 40 hz when it shouldn't be that low according to the specs. I can definitely hear dialog clear because my room isn't huge.    I did set the sub crossover at 80 hz as recommended and it is still set to lfe. I can definitely hear bass very well. It's either lfe or lfe plus mains.     Update: After running more tests with my ears and the demo disc this us what I've settled on that sounds really amazing for my room. The bass rumbles really stand out and everything sounds blended.    Fronts LR 40 hz center 60 hz rears 60 hz dolby 150 hz   sub lfe 80 hz  

Although the Cornwall IV digs slightly lower, it does not provide the "punchy" bass of the forte IV, which is apparently what you miss based on your description above.  The low end means a lot INMHO.  Regardless of how many hours you put on those Lascala's you will need to augment with a sub to get the low end you are looking for.  

I have Heresy IVs and '81 La Scalas.  Keep the La Scalas.  I very much enjoy my H IVs, but little sounds as light and "real" as La Scalas do.    Which crossover came with your La Scalas?  Can you put it back in?  Perhaps rebuilding the original will restore their proper sound. 

I know graphs don't tell the whole story but do you have a similar one for Cornwalls ? @82 Cornwalls ?

What happened Cory take you on full time?