Cornwall IV and subwoofers

Bill,

I don't think I'd high pass the CW as was mentioned above. Their bass quality down into the mid  to upper 30s is too good to mess with. I'd just roll the sub in and let it do it's thing way down low.

Oz, I'm with you. That's my feeling as well.

@wrm57 ,  FYI,  classic golden age jazz (50s-60s) is my favorite cup of tea.  And, the RELs really augment the lifelike sound that's present.  Surprisingly, even with 1950s recordings--they bolster the ambiance of the recording room.  I was playing Oscar Petersen's 1959 Porgy and Bess last night and the RELs do more than I would even expect on such old recordings. 

One more thing---

I think the Cornwall IV bass response is accurate where it exists. It's not bloated at all.  But, if you have a bigger room they may need help to pressurize it.  If you put these in a smallish room, I bet the bass end of things would sound larger than life.  My room is 15.' wide by 22' long with 10 foot ceilings.  It's big for me. 

I am. I have the Cornwalls on low (6") amp stands to get them slightly off the floor in my 13 x 22 listening room. I'm running a Pass 250.8 amp, PS audio DSD JR and Pass XP10 pre amp. I have a REL s510/SHO sub on high level inputs off the Pass amp and a pair of SVS PS3000 subs (sealed box, not ported) running off the pre amp outs on the XP10. I like them because of the mobile app interface and the ability to tune them via the app. I run them all so they come in around 60 hz or so and at a low volume. They all integrate really well. Te Cornwalls are great but lack the very deep bottom end. I also use Roon and Quboz and like Roon really mostly for it's parametric EQ functions. The Cornwall do have a tendency to have a bass boost in the 125k hz area or so, which I trim out with a deep notch filter adjustment on the Roon EQ. overall I'm pretty happy with the Cornwall - they're huge however- even bigger in person that what the measurements suggest!