Thanks @tj-sully!
I use wireworld eclipse 7s. Sound great on my 20.7. No idea what price point you are looking at. But FWIW.
For anyone that is a true planar fan, these are absolutely incredible.
Very pricy - the Botticelli as shown at RMAF is $87,000 - but possibly the best speaker I have ever heard, better than even the Apogee Full Ranges.
Iām working on scheduling a longer, non-show conditions listen.
I concur, absolutely. I also heard these the the RMAF and they are incredible.
ā¦ and Alsyvox make two LARGER models than these.
Awesome. Follow up with your impressions. Iāve heard 200k speakers that I was not impressed with. Itās a sad day when I think - 87k huh - well at least they sound good!! 
I saw in one of your videos, that ANās IRS Killer prototypes use the BG Neo10 midrange. I built a pair of speakers that pair it with the Linaeum dipole tweeters, and a pair of 8" woofers. Picked 8 inchers because I know Iād be using a sub. They all blend well.
Mongo
I played with a modified RadioShack pair of speakers a few years ago with the Linaeum tweeter. Very special drive unit.
Yeah those linaeum tweeters were pretty nice. I had a pair of RS speakers with those (canāt recall the name). Great tweeter wasted on a mediocre (at best) speaker system.
Mediocre? Youāre being kind. I remember hearing those speakers at RS, and they sounded like shitā¦but there was something about the mid-high that really caught my attention. I filed that impression away, and was looking around on Ebay a couple of years ago, and saw some of those tweeters listed for sale. I ended up buying about 4 pair of them, for not much money, and started tinkering with them. I bought a pair of BG Neo 10s, and crossed over at 500-4500 with 2 8" woofers. Iāll post a few pictures of it later. Quite obvious that RS didnāt know what they had with those tweeters. If youāre interested, get on UTube, and do a search for JP Stacks. I entered a speaker building competition with them.
Mongo
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Thank you fryman,
I am sure you are enjoying your Amphitytrons on a daily basis the way I do.
All the best
Terry
Welcome, fryman!
A moirƩ fan. 
That isnāt a sub. Both cabinets make up a 3-way speaker- 2 8" woofers on the bottom, and a BG NEO 10 midrange and Linaeum tweeter on the top. I do use a powered 12" servo sub along with them, tho. Iām making another set of speakers to enter in this yearās speaker building contest. May not be done in time.
Thanx for writing.
Mongo
June 25
Mongo:
JP Stacks
That;s an interesting position for your sub.
Itās interesting; no shade on the Analysis owners here, but whenever Iāve heard them at RMAF they were just missingā¦ something as compared to Apogees.
I have never heard that Apogee magic from any other speaker until the Alsyvox Botticelli. They literally had every bit of magic the Apogees ever had plus actual dynamics.
However, I canāt honestly say whether they can handle things like the heartbeats at the beginning of Dark Side of the Moonās Speak to Me without running out of extension; I can do that to my Apogee Caliper Signature (generating a nasty āthwackā) with even a 150 wpc amp.
If it werenāt for that, I would have already done more to acquire a pair.
There may be better or more accurate speakers out there, but the Apogees and the Alsyvox speakers have a certain magic to them that is palpable and inescapable if itās what touches you.
What eventually caused me to replace my Caliper Signatures as my mains is there were certain defects they had that I would hear on certain tracks, causing me to wince when I played themā¦ and thatās not what you want from any speaker, especially when those tracks are songs you love (which they were.)
In particular, there were two Carpenterās songs that could make the Apogee ribbons sound like a wax paper over a comb kazoo. On a visit to Rich Murry at his house, I surprisingly found I could make the Divas do the same thing on the same track, but not the Duetta Signatures or the Full Ranges so itās obviously an inherent harmonic of some type.
Spending $87K to find the Alsyvox Botticellis do the same is not my idea of a good time. 
@billk any idea if your 150W amp may have been clipping and that caused the āthwackā? Any speaker gets very unhappy with a DC input.
I know my Sanders electrostats require loads of power to remain fully in control without clipping. The Sanders Magtech amps are rated at 900W into 4 ohms (and a bit higher into 2 ohms). These play plenty loud for me with great dynamics. The 10" TL woofer generates loads of high quality, well-integrated bass too.
Do you find that 10" subs work best for your speakers? Iāve heard the smaller, faster subs work better with Planar/ribbon speakers. Iām about to get a pair of Maggie LRSās (a bit lower end than your Sandersā¦) and I am thinking of going with 2 10" REL subs as they are quicker. Iām not a bass freak so it should be more than enuf bass.
@stonefree1911 Iām not using subs at all. The Sanders 10e system uses an integral 10" TL (transmission line) woofer in each cabinet.
Iāve read lots of recommendations for subs on this forum, but worry about seamless integration with my well-engineered speaker system. Donāt notice any lack of bass with the standard setup.
See photo below:
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@stonefree1911. Trust @Paul and his Rel recommendations . The Rels will be able to keep up with and integrate with the Maggieās. I have a 2 Rel sub and Maggie combo and I am very happy with the set up. Your room size is a big determinating factor on the size of the subs.
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