Wow, nice write-up. Sounds like a killer mid.Okay I have about 20 hours on them now and am simply overjoyed with these things capabilities. I have had the good fortune to test many great speakers the last couple years and have been pretty happy with each and every one of them. Says a lot for todays tech. These quite simply are on another level. Their ability to reproduce 60-150 hz where the impact is at is stellar. They are tight and accurate which you would expect from a high end 6.5" driver. Whats really impressive is they can also play just great to 4000hz (as tested though are said to play higher just fine) while also producing those bass frequencies.
One song in particular that stands out is a song by Haim. Its a remix of.... crud, have to look up the songs name again. Anyway there is a complex bass line in the beginning of the song that a lot of 6.5" speakers have a hard time reproducing. The Illusion, Hertz, Esotar and TM play them just fine but when she starts to sing while those notes are being played it really resonates her voice and is a bit sloppy. Less of an issue with the Hertz and almost imperceptible with the Esotar but with the Sinfoni it sounds as if it is a different driver making the midrange frequencies. In a two way configuration these are a superior speaker to anything I have ever heard. And I mean EVER.
As I have said before, they don't reproduce music but sound like the actual music. Like the artist is there with you singing only to you. The cones speed and control is breathtaking and for me it is listening nirvana. These are the midranges by which all others should be judged. Its the BMW M3 of the speaker world. That's not even a good comparison. Its the BMW M3 with the performance of an Agera R.
Pink Floyd is a whole new experience. I can sit for hours and listen to it. The sound so much reminds me of my old Infinity Beta IRS Vs I am shocked. Then again hearing memory isn't the best and its been a decade since I had them but I always remember losing myself in the music and the feeling of bliss when I heard them and these speakers provide the same feeling.
I do have them paired with some pretty righteous tweeters though. The Scan Speak R2904 is a joy paired with these. Seamless blending and an excellent companion. If the Sinfoni tweeters pair half as well then this will be one exciting ride.
I still have them high passed at 80hz with a 12db slope and the subwoofers are at 63hz with a 12db slope. I run the mids to 3.15k on a 6db slope and the tweeters at 3.15k with an 18db slope. So far they take anything I can dish at them. They have even allowed me to listen to some of my songs I like that I only have in a lower quality MP3 version. On some of my other systems these songs just sounded terrible due to the poor recording quality. While I hear it with these they seem to smooth out the rough edges and allow me to once again enjoy my entire music library.
They have a heafty price tag but are worth every penny. They are cheaper than the Esotars but I believe to be a superior speaker. They are more than the large Scan-Speak 18WU but you don't need a ridiculous mounting depth for them.
In short, if you have the means then you will love these speakers in your system. Easy to dial in and the sound is just spectacular. I can only imagine what the Grandioso must be like.
I liked a few of the itemized elements of those mids in their literature like the bifilar voice coil. I use bifilar coils in my larger subwoofer drivers to lower inductance due to the size/length of the coil which works out well overall since the WW (winding width, or total length of the windings) is almost 3" tall. It's neat to see someone employing the same bifilar coil style on a mid.They really are Nick. Expensive but really nice. They blend perfect with the SI BM sub but then again its been easy to pair anything with those.