Klipsch Heresy iv...Your experience.

@wolf_garcia Would you mind sharing your settings for your sub with the Heresy IV?

I'm using an SVS SB-3000 with my Heresy IV.  Low pass at 60hz with a slope of 24dB as recommended by SVS.  

Thanks

2 dissimilar REL subs (Q108MK2, Q150e) both around 45 to 50 hz, which matches well with the Heresy IVs.

Wolf, the Heresy IV's woofer goes all the way up to 850 Hz. Middle C is 256 Hz to put that into perspective. So the woofer is carrying a very substantial part of the midrange. The woofer is also not a long excursion driver and even ported it only makes it down to 48 Hz. You probably like it on the floor better because it does improve the bass. They tilt it back to aim the speakers at about where your ears are supposed to be in a way mimicking putting them on stands. My point is getting the crossover up to 80-100 Hz will substantially clean up the midrange and add a lot of head room to the speaker as the woofer is it's weakest link. But you have to use a 2 way crossover to do this. Then you can also block the port which will tighten up everything further. You already have the subs and crossovers can be had inexpensively. Digital are the best if your preamp has digital outputs. 

mijostyn...I’ve also owned a pair of great sounding Heresy IIIs for a few years so I know something about how these things work (I’m also a successful and vastly experienced professional live sound mixer and musician), and actually did try them on stands and decided they simply sound better to my ears on the floor...they (both the IIIs and IVs) project a great soundstage up into the middle of the room and are amazingly coherent at my ears around 9 feet from ’em. The midrange does not need "cleaning up" as its range as utilized is easily handled (the same woofer is in my IIIs and has always woofed accurately with superb resolution within its designed limits), and I am fully aware of its range and have a good set of ears. There is absolutely zero need for a crossover (I have no desire to run my subs at 80 to 100hz as they’re SUBS not lower mid speakers) as these speakers perform brilliantly within their designed parameters, and although the IVs can play 10hz or so lower than the IIIs they’re not "boomy" or "lumpy" as the bass presents itself smoothly. Blending my 2 subs where the IVs bass response trails off actually works perfectly (as it does with the IIIs). It seems you have no actual experience with Heresy IVs (or IIIs) and are making assumptions about what you think I need to hear while disregarding what I’ve said. Not unusual around here.

Not to disagree with wolf, because many people prefer the Heresy's on the floor, tilted up, and not to mention, they were designed to be used this way. However, for my type of presentation, I prefer them on good, rigid, non resonant stands, away from the rear walls, with the mid horns at my ear level. To each his / her own, as there is no right or wrong. But wolf, I am right.....lol......Enjoy, be well and stay safe. Always, MrD.