Sonus Faber Guarneri vs Guarneri Memento

Milimeter, Ken Kessler in his review states (from memory) that the tweeter is shared between Amati Anniversario and Memento, and is a modified version of the tweeter used in Stradivari.

""""07-24-10: Milimetr
There is one more interesting thing - so far I thought that Stradivari Homage, Amati Anniversario and Guarneri Memento uses the same modified Scan Speak ring radiator. I have seen pictures of Stradivari tweeter ang Guarneri Memento tweeter and back of both speakers differ."""

Milimeter- probably it because diferent high pass transfer function- tweeter guarneri M would benefit from less pronuonced Fs peak(more compression and higher comliance), thus chamber could be diferent size , stuffed diferently- adjusted for better high pass function. amati aniversario can have same or very similar as stradivari, as thei transfer function similar. but this is only quess.

Guessing is good and here are the pictures of Stradivari tweeter:
http://www.audiostereo.pl/zalaczniki/1704187_2.jpg

and Guarneri Memento tweeter:
http://www.audiostereo.pl/zalaczniki/1704187_1.jpg

You can easily see how different is the tweeter from standard ring radiator. Front bafle is diferently shaped, magnet is double sized and there is acustical wood chamber.

I looked at both pictures, I would say theese absolutely diferent tweeter. picture which you are refering to Guarneri memento tweeter is the same as Auditor M (vifa XT)- the only diference is front flange where auditor M have plastic one coated with some soft rubber paint(older auditor NOT M had simple plastic) and back magnet closing- auditor M made from plastic and this one with wood.

another pictuare you are refering to stradivari is based scan speak 70000 series - i see that neodymium magnet and clasic pin. its much faster and dynamic tweeter than first one.

i see why auditor M and Memento sounds similar to some people. I think to guarneri memento owners its quite a dissapoinment to see same tweeter as auditor M(i hoped that all homage series have same 7000 series ring radiator based tweeter)- and backward as owner of auditor M in bedroom system I am glad to know that my auditor M uses basicaly the same tweeter as guarneri.

"A 25mm ring radiator tweeter with dual toroidal wave developed directly from that in the Stradivari, it's identical to one in the Amati Anniversario."

Ken Kessler's review at: http://hometheaterreview[dot]com/sonus-faber-guarneri-memento-speakers-reviewed/