[How do I get bass out of Klipsch Cornwall IV?]

Just seen your post - I have similar setup 300B tube amp/Cornwalls/Denafrips Venus II - put 6N copper speaker wire to smooth the sound (changed from Nordost) to get big room shaking bass was simple - got Roon with HQPlayer and its like a completely different system - all I could want...give it a go and you will never look back...Graham in UK. 

[Klipsch crossovers]

I want to upgrade my CW~IV XOs to make them more 3D and resolve some harshness but am having real trouble finding a schematic… can anyone help?

tried DSP in Room but still a bit shouty…

got nice warm tube amp - 300b/805 and Weiss dac, Nordost balanced cables/speaker wires …

great sound but have to choose my tracks a bit carefully or get fatigue