What are your opinions of DSP's for speakers

DSP packages in speakers are typically for implementing active crossovers, obtaining a performance benchmark, etc, not for "room/bass correction". 

The best sounding Klipsch speaker, for example, is the flagship Jubilee model which comes with DSP/active crossover. The "essence of music" didn’t get lost on the Klipsch Jubilee and it sounded very good. But, the "essence of music" got lost a lot to my ears on the lower model purist Klipsch heritage speakers. Purism lost the essence of music on that one, for sure.

Room Correction, etc, you don’t need to worry about it. Your 2 channel purist electronics won’t have any of it, with a couple of exceptions perhaps. Yamaha, for example, introduced some room correction with reflective sound control filters, etc on one of their 2 channel integrated amps, R-N2000A, which is tech borrowed from their multichannel gear. You could toggle it on/off and determine which sounded better, i.e. decide if the "essence of music" got better with it turned on or off

On the same note, any purist DAC which says FPGA is very much in the DSP realm. The guy who bought some 80k apparently "purist" dac which sounded like his soul finally came alive actually ended up buying a DSP dac. It was the DSP that brought his soul back from the dead in such instances, it appears.

This seems to be a popular trend with many speaker brands. Some have internal amplification with DSP’s and some have external implementations of it like Legacy. I have heard some good results with it being used but don’t necessarily like the idea of everything being digitized for the sake of room/bass correction. Do you own or plan on buying a speaker like this, or have you heard any using it? 

@atp001  it is impossible to have the perfect room but it is possible to get as close as you can. And that is done with targeted treatment. Using treatment you'd need and not just placing them anywhere in the room. Good speaker/room coupling with SBIR effects taken into consideration, subwoofer integration where necessary and then top that with good and sound DSP implementation and you have as perfect of a space for audio as possible

++ @mikelavigne re: DSP being a tool and the tradeoff being musical essence.

Personally, I find the tradeoff acceptable in the lowest frequency ranges (say under 300 Hz or so), combined with judicious placement and integration of subs, where room characteristics due to resonance -- not reflections -- must be dealt with. I’d rather deal with reflection issues through room treatment. I optimize as much as possible of the low frequencies using placement and phase controls on the subs, leaving DSP to do the "finishing touches." 

I have also found, for my situation, the DSP (either or both of PEQ and convolution filters) in HQPlayer to be superior to that bundled with Roon. I personally found Roon’s DSP to suck too much life out of the music. That may have changed over time, since Roon has made improvements, but I’m happy with what I’ve got with the combo of Roon plus embedded HQPlayer.

My Weiss DAC has excellent DSP available if wanted which I find very useful in some instances.  Typically I leave it all off, but I really like the ability to tailor the sound for different situations.

@steve59 -- true the OP didn't ask the question, but another member did ask that very specific question about halfway down the page.  My post was directed to him.