Gradient Revolution Opinions

Eminent Technology LFT-8b. Add GR Research OB/Dipole Subs for State-Of-The-Art bass, excellent in small rooms due in part to their dipole room-loading characteristics.

Your room is dictating the Pregnant bass hump.
if a speaker was accurate out of the factory for your room it would be broken in its design concept.

There is a company in bis for many years that can deal with this
particular issue but it's not for the simple or feeble-minded types.
 Research the Vandersteen Quatro CT Phase /Time  with analog Room compensation its
able to be adjusted even just a few inches out from the wall and perform far beyond expectations.
 Best JohnnyR

The Gradients excel at the realistic reproduction of bass frequencies even if they don't go ultra low.  The bass modules were developed as subwoofers for the Quad electrostatics and they possess that level of transparency.  The woofer modules do like power and I suspect the Lamms will be a good match.  The coaxial midrange/tweeter is coherent and very good at imaging, but there are smoother and more airy units available at a similar priced loudspeakers.  Unlike most loudspeakers the Gradients can also be setup for free field, near wall and I think even corner placement and still maintain its accurate bass qualities.  Additionally, if you want to take them to a higher level, an active crossover unit is available that allows you to use multiple bass modules per channel.  I used them from about five years with a high degree of satisfaction.

Here's some links to reviews:

http://www.regonaudio.com/Gradient%20Revolution%20Review.html

http://www.6moons.com/audioreviews/gradient/revolution.html

https://www.stereophile.com/floorloudspeakers/616/index.html

Good luck!

All I know is that when I had my Quad 63/Gradient Subwoofer combo (built for the Quads), it was the most seamless dynamic speaker/panel match I've ever heard, before or since.

The bass was almost as boxless as the Quad sound.  Though, it also lacked some of the kick/oomph of non-dipole subs.  But that aspect matched the same character of the Quads.