most realistic sound from a stand mount Loudspeaker active or passive

@bsmg Why Carbon Fiber?  It does make a difference.  The best way to reduce cabinet resonances which act on  the driver is to have an ultra strong and rigid cabinet.  Carbon Fiber strong and rigid.  Additionally, the core has a lot of surface area which helps dampen sound reflecting back into the cabinet.  An ultra rigid, well damped cabinet produces no sound and the result is an unbelievable level of clarity from the driver.   

Mine is not the only company using CF in cabinets.  Wilson Benesch and Marten use CF over different cores in their cabinets.  Magico uses CF over aluminum in its M line and other companies like Vivid and Rockport use different composites in their cabinets.  

It does make a big difference.  You will note that none of the companies I have mentioned are known for producing inexpensive products but they are generally highly regarded.  

MDF is also rigid and strong. A lot of speaker manufacturers bleat about "natural wood cabinets" but they never mention that wood rings like a bell. The ideal cabinet would be something like a cinder block or even a rock, but adequate damping in the cabinet is the key to eliminate unwanted resonance. Adequate bracing is also critical, as is the material used in the cabinet to absorb reflections and standing waves. I consider carbon fiber to be just a gimmick, fashionable, impressive to the novice, and of no benefit with regard to sonic character. Your allusion to mfgrs that turn out products that are not inexpensive but highly regarded is noted but ignored. I’d be willing to bet those companies spend a lot more on advertising than they do on acoustic engineering.You also mention surface area; that is nothing to do with carbon fiber; a one cubic foot cabinet has the same internal surface area regardless of what it’s constructed of.

TAD ME-1

@emtrey - what are you using for an amplifier?

the amp I am using is an Exemplar Integrated amp