You can read the full report elsewhere, but here's the important bit about activating T-707s (from a less than ideal listening session with 2 speakers either side of the 707s, but that was consistent between passive and active so consistent in the comparison):
In passive form, the Janis Ian track was a pleasure to listen to. The room was joining in to an extent but it was easy to hear that and ignore it to get to what was going on directly from the speakers. The track is fairly funky by JI standards, which is to say its a not very funky track by funky standards, but there's some decent electric bass lines along the way. The track starts quietly then adds extra instruments and complexity along the way. The music was joined up and enjoyable in passive form, bass tuneful, imaging is good but not exceptional (but hey, look at the way they were set up on this occasion, that's no surprise), vocals nicely rendered - this is a very good pair of speakers in action. We listen to the whole track, then go back and listen to the first 90 seconds or so to try and get the beginning of the track stuck in the memory.
Conversion to active takes a couple of minutes. Understanding the magnitude of the difference it brings is a matter of seconds, then, as the track plays that understanding develops and deepens. The active conversion brings much of what I'm used to hearing in equivalent changes in Linn active systems. Its that clarity thing, the edges of notes are better defined, instruments start and stop with more conviction, the bass lines are crisper, tunes are easier to follow, the reverb on a guitar goes on that much longer but doesn't crash into the other instruments, there's a space between and around each instrument that wasn't there before. Ian's vocals are better rendered, they've taken a step forward from the mix - there's subtelty in there that wasn't there before. But all this is still joined up as a single musical message. Back to that first few seconds of going active, and the thing that I really wasn't expecting but was quite a stunning change - the Ian track has a number of quiet elements right at the beginning of the track and that quietness was soooo much quieter than before. With passive, I wasn't really concious of any background noise and hash in those quiet elements, but with active, the lack of that noise is very apparent (I'm sure there's still some there, but its notably less obvious).
I wish I'd made a note of this track - I've been trawling through the Janis Ian tracks on Tidal, but its a long list and I haven't found it yet!
We then listened to the Georgio track and the way these active 707s can power through this piece of Daft Punk inventiveness is very impressive. The intro clearly reveals the sounds of the 3 different mics used to record it, and the chatter in the background is easy to follow. But the real test of this track is about 3/4 of the way through when the very complex bass lines play at tremendous speed and the majority of systems just can't do this bit very well - they end up playing monotone thumps rather than several complex and tuneful notes. The active 707s do a great job on this not only maintaining the tune but revealling a really growly edge to the guitar, far better than some more expensive systems. And playing loud doesn't phase them at all.
So, for me, an easy conclusion to reach. But here's the sting in the tail, that will be of interest particularly to Naim system owners. The passive system was using a single NAP 300DR with Naim's expensive SuperLumina speaker cables. The active system used 2 of the "lesser" NAP 250DR power amps and the far more reasonably priced AudioQuest Rocket speaker cables. Game set and match to active! Get that SNAXO on the production line Naim!