Spatial M3 Sapphire or Klipsch Forte 4

If you listen at 80 db you will need a sub or two for the thump. If you listen a 95 db you will probably need room treatments to tame the room. We need more info to provide good feedback…. room size, room construction and furnishings, source and amplification, listening volume, listening position … the more the better. 
 

I own the M3 Sapphires, their sound is very lifelike. I’ve never heard the Klipsch. The M3 will have a very realistic bass tone and presentation, but the Klipsch might actually “thump” a little more/differently…. but you will likely have more of the horn presentation which some like and some don’t.

Send more info….

@arafiq I had the CW IV for about a year and moved on to the LaScala II. But I stand by what I've said about this latest version of the Cornwalls. Really a great speaker and much improved over earlier versions. Highly recommended.

@mike_f Personally I think the Sapphires need a little more wattage but I do think that may be based on room size and listening levels. I also agree with @snapsc that the sound is so very lifelike. I think the presentation between these two speakers would be vastly different. Also, the M3's are not small by any means and are better out in the room. I have had mine since 2019 and it took me a while to really love them. tweaking acoustics, amps and they love improvements on the front end. M4's might be fine in your listening room and be less $$

I owned the original Spatial M3 Turbo S. It represented a terrific value, and offered great sound for the money. However, they don't really do bass the way you're describing. In my open floor plan home I needed to employ (2) 15" subs and a sub EQ to get somewhat realistic bass. While I owned them, I also seriously considered adding many room treatment panels because I felt the speakers demanded it.

I'm still a Spatial fan, and wish I had a room they worked well in (small, well treated, long but narrow, and with a low ceiling) something like a purpose built man cave in the basement...unfortunately I don't.
 

This is a long way of saying the Forte 4 is likely going to be easier to integrate into a room unless you already have the right dimensions, room acoustics dialed in, and multiple subs (for your classic rock).

@ozzy62, the LaScala has been one I've lusted over in the past but have a hard time justifying the real estate for the amount of low end the speaker provides (on paper)...I've not heard them. Are you using subs to support the lower frequencies?

While it doesn't go much deeper on paper, the LS II "appears" to have more bass than earlier versions. On about 80% of what I listen to, they are fine on their own. That said, I do have a pair of HSU ULS-15 II subs to augment them. My room is dedicated, so I don't have to worry about how big a speaker is.