The Gallo internal crossover within the speaker, between midrange and woofer, is analogue.... and connects to the woofers first voice coil
The woofers 2nd voice coil is direct connected to a set of input binding posts...
For best results, if using the 2nd input, you need to also put a High Pass on the main input (so little or no signal hits the first voice coil)
The Crown amp's DSP allows for flexible crossover points, but doesn't do anything with phase etc... - However Dirac Live handles phase and impulse
Dirac's SRC is going to be the next big thing in Room DSP... up to circa 1kHz:
Dirac Research is looking to the future. Dr. Lars-Johan Brännmark, Research Fellow and Chief Scientist at Dirac, has given a glimpse into what he believes will be the next generation of room correction. Spatial room correction is a concept that goes beyond correcting each speaker individually in...
forums.audioholics.com
This article describes an approach to the challenge of applying DSP room correction to complex multichannel setups, intended for immersive audio reproduction. Instead of one...
www.dirac.com
Sort of a cross between DLBC and Noise Cancelling active correction type technology.... with inspiration from MIMO methods that have been used for quite a while in Radio Frequency areas such as WiFi....
Basically every low frequency capable driver in the room (with a seperate channel) - becomes an active participant in the provision of bass and both the Equalisation and the active correction thereof.... will this be able to overcome inherent room nodes? - I am not sure of that. But this does offer promise as a step above and beyond, and a situation where an all "Full Range Tower" surround setup would become a logical option.