Spatial M3 Sapphire or Klipsch Forte 4

@ozzy62 thanks. I need to find a local dealer to go listen to the CW IVs soon. 

If I had the room for Cornwalls I probably would have bought them, but I bought the Forte IV and have ZERO regrets.    I love these speakers .    They are so good I revamped my amp and preamp after buying them .   I'm actually having a 300b built.  I almost bought the Forte III after having owned Hersey III but the new mid driver is much better so I waited for the IV.

It’s mostly the amp. I too have OBs, in my case Emerald Physics 3.4s (concentric 1" polyester in a 12" woofer) and my room is ~ 35 x 20 x 12’ peak in an open beam ceiling. Front wall is ~ 80% glass and rear wall is 100% glass. A tough room to get thumped in. I tried using 2 SVS barrel powered subs, which I bought new 10+ years ago. In those days they were focused on HT, and these sucked for 2 channel. I sold them about 2 months ago, and my musical enjoyment is the better for it, but, no deep bass, and missing a bit of the muscular musical scale. By far the 2 biggest changes I made were replacing my EVS 1200 class D 600/1200 wpc dual mono amp with a LSA Voyager 350 GaN amp. And although the V has ~ half the EVS’ power it is actually a lot more room filling. The other addition, which significantly improved low end (as well as the rest of the spectrum), was replacing a Marantz HD CD-1 that I used as a transport with a dedicated transport- Audiolab CDT 6000.

I still want what good subs can bring, but the cost to do it right is elusive to my retired SS budget. HTH

I own the M3 Sapphires and use them in a 13X20X6.5’ dedicated basement listening room. I used to use two subs with my previous speakers (towers, bookshelf, Maggies) but moved them out when I got the Spatials. I use a 30W Class A amp (Pass Labs XA30.5) and I’ve never seen it leave Class A. I listen at 80 db avg. with 85db peaks (A Weighted). Lots of good comments on pairing the Spatials with LTA tube amps.

I love the dynamics of the Spatials and don’t feel they are missing any slam, nor do they overload the room! Honestly, they are amazingly refined speakers. The detail and texture in the bass is extraordinary. I have no Klipsch experience but I suspect they are VERY different in their presentation.

If you want efficiency, then Klipsch is at the top of the list. You can't go wrong with around 100db Cornwall's with a tube amp. They play low volume full bodied music or blow your roof off rock & roll with ease. Forte's and Heresy are basically mini-me Cornwall's and do the job just as well.

BUT

Spatial Audio Sapphire M3 open baffle is the reason you buy a two channel Macintosh integrated amp at 100wpc (AKA MA5200/MA5300) or the top contender according to you, hook up the speakers, and end your quest for the holy grail of audio sound so you can finally think about other things you want to do in life!.