That's not the speaker i use.
Sorry dude. You got everything else wrong in this thread, the fake gotcha doesn't help your case. Post some actual data on your speakers and more importantly some measurements and it would help. The price doesn't help just so you know.
You have a pair of speakers with weak bass. And an oddly peaked bass, putting aside the way Stereophile sums the bass measurements.
Do you think any of the members of this closely related family of speakers is going to have bass magic? Like if they come out with an SE edition made from laminated antique violins, or a cryo version, are those going to have magic out of two moderately sized woofers?
Perhaps read a bit on ASR as to how much difference an amp can possibly make. These actually will have different bass response, by design.
Sidebar 3: Measurements
www.stereophile.com
But are corner case for sure.
They look nice though, with the unique Sonus Faber cabinetry. I imagine they don't sound too bad, except for the weak bass. I've never heard their lower end models like your speakers, but no amp with a few exceptions like that absurd Wavac, is going to change the bass response dramatically. And none will boost the actual output capability of the two woofers.
Have you tried position relative to the wall? If not, give it a try since room is the biggest factor with the given bass output your speakers have. Otherwise enjoy.