In my opinion, speakers should not be selected (entirely) based on measurements. Accordingly, I'd recommend listening to Magnepan 30.7s, Focal Sopras, B&W Nautilus and MBL Radialstrahlers in addition to the fine KEF and Revel models mentioned above. All these are likely to sound different and preferable to others in different ways.
Hi
That assumes you can find somewhere to audition them, which isn't a trivial undertaking.
HEA stands for High End Audio
I 've lived a longtime with Magnepan.. They do certain things, right. At this point in time, I know I've heard many better speakers. As for objective measurements, let's say they usually don't shine... If one has a special HEA bent, perhaps they could contemplate this speaker. As it is and likely sound based on what I lived with he SMS, Tympani, MG 1.2, 3.6 and 20.1 ... I would choose a Salon 2 over it in less than the time it takes to form the "yes" sound or gesture... Since they belong to the same HEA-world, I would also jump on a Magico A5, before I consider this unwieldy and very exigeant speaker. That would be my advice to any audiophile and I may find measurements to back me up.
At any rate, I leave it to the reader to decide what t o make of this kind of frequency response from what was for along time their TOL.....
Frm Hi-Fi news
Yep.. those peaks and through are the FR the 20.1 ...
As for Avalon, they're very HEA-type of speakers. A look and a mystique. I didn't like these then. A lot of money for performance, I have serious doubts about. If I were to go by the FR and measurements of the Indra and I have no reasons to believe they have done better these past few years/.. The Indra cost then $20,000 in 2008 ... Currently they have a speaker called Precision Monitor, their entry-level

and it cost about $20,000.oo T.. If you think about the Top Of the Line (TOL for short) then prepare yourself to shell out about $325,000.oo ... I'd like to see some measurements. I know I never will ...
Spectral... Back in the days when I was on the other (dark) side, I liked them , even assigning them a sound. Fussy like hell some of these oscillate if the speakers cables or interconnect don't have a Zobel network. The amplifiers are often flat to MHz... one has to wonder why... more noise would be amplified by these amplifers due to that unneeded bandwidth, but I diverge. Spectral usually doesn't submit its amplifiers for reviews or measurements. That is their mystique, you buy if you want to and should submit yourself to their whims. A bit like another darling and nonsense HEA company, FM Acoustics. Spectral are, also are expensive, very , although in the crazy world of HEA, they are what they would call mid-tier in term of pricing .. If you were to look at their website you would not think they exist, their website looks like it was designed in 1995... by some teens playing on a an Pentium 1 PC.. One has to wonder what they offer to the solved problem of amplification... Oh they usually recommend MIT cables and sell cables made by MIT as their own, or they used to.... That is not a plus. Read the rest...
Now about MIT. They must be the poster child of HEA BS.. then again there are so many companies that would vie for this tittle.. Anyway. They make audio cables with a box at the end. They are one of the two companies that makes such cables (the other is Transparent Audio and its prices are similar) and people... They're a riot, The kind of nonsense these people write is otherworldly.. and the prices for these cables are cosmic or comic, you decide ... verging on the ... words are failing me..." obscene", comes to mind. I don't know if one should laugh, cry or report these people... Perhaps all 3.
Their TOL speaker cable.. they don't call it Speaker cable but rather the ACC 268 Rev2 "Articulation Console,Speaker Interface" MSRP or suggested price if you will is ... for an 8-foot pair, $111,995.oo... You read it right:
One Hundred Thousand Nine Hundreds Ninety Five US Dollars and zero cent. Wait there is more! The Bi-Wire version cost a bit more for the 8-foot. it cost 117,995.oo ... If you need 15 feet it the pair of bi-wire cabling for your speakers you would have to shell out $125,000.oo... Need I write more..
From MIT Website this is their catalog, you can peruse it to see some prices. Some of you may need such to take their systems to the next level.
From the Music Interface Technologies Website.
Their Catalog. Please click and be utterly shocked or disgusted. Spectral has an agreement with
MIT for their special cables...

. At one point , I don't know if that is still the case, the warranty may not be honored if you use other cables ... That disqualifies Spectral IMO as a serious company.
The thing with Internet fora, is that, it can be difficult to convey some emotions. I hope the poster I quoted and replied to,
does not seriously consider these particular HEA "things" , for the lack of a better word, as endgame...
No Peace as an hello to
@Sal1950 