Great thread.
I am very interested on it, as I have owned the same speakers long ago, and also found they could spread a very large sound stage in classical music (Carreras singing Misa Criolla was something very special), but not in music asking for high energy, such as 70's rock or some very demanding brass music from Handel like the Music for the Royal Fireworks.
Can you tell us which recordings were used to check the scale of the system? I see you focus mainly in sound stage dimensions and apparent size of the performers, something I also praise a lot. But scale also needs the feeling of power with some types of music.
Hi Microstrip,
some of the recordings that we listened to:
Large scale orchestral music:
Hindemith, Symphony 'Harmony of the World' (Blomstedt/San Francisco Symphony/Decca)
Bruckner, Fifth Symphony (Wand/Cologne Symphony/RCA)
Both played at peak SPL greater than 90 dB.
Large-scale choral music from Peter Maxwell Davies (Collins Classics)
Shostakovich, Symphony Nr. 14 for soprano, bass and chamber orchestra (cond. Janssons//Decca)
Smaller scale music:
Stockhausen, Freude (Joy), for two harp players
Stockhausen, Capricorn, for bass voice and electronic music
Stockhausen, Susanis Echo for alto flute
Peter Maxwell Davies, Naxos Quartet No. 4 (string quartet, label Naxos)
Beethoven violin sonata No. 1
Elvis Presley, a few songs
Neil Diamond, Ever More
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As for energy, I am not sure if you have heard the Ensemble Reference in combination with a subwoofer. This makes an enormous difference in perceived power, even though the mini monitors reach down well into the full mid bass range (with their passive radiators in the back; the position of 6 feet from the back wall is also optimized for a clean projection of that). I personally could not listen to the speakers anymore without the combination with the sub -- and for rock, it's an absolute must (Peter's Magico Mini II speakers reproduce more of the bass region than mine, so a sub is not required as much). I had Peter listen to just the beginning of 'The Rover' (Physical Graffity) by Led Zeppelin at loud volume, with and without subwoofer, to demonstrate the difference (the sub shines on that passage also in terms of rhythm & timing).
The tube amps with their internal modifications and external power supplies also project more energy than the stock amps from 23 years ago. Importantly, the size of image is now stable through loud passages.