Been living with a pair of 15" Tannoy Berkeleys for a couple of weeks - kindly loaned by enbee23 (Nick). It's been interesting. Sonically, they do some things better than my usual Triangle Naias (bass extension, presence and impact) some things worse (everything else, if I'm brutal). For all their faults, they are definitely a LOT of fun!
A week or so ago, I took a punt on some one-off speakers designed by the MD of Volt loudspeakers specifically to optimise the "legendary" Decca London horn-loaded ribbon tweeter. They combine this with a 10" Volt mid-bass unit and offboard crossovers. They appear to have been professionally built, as the finish clearly was exemplary - they're the best part of 30 years old now, so look a bit tired and chipped.
I bought them unheard, and their owner VERY kindly delivered them to my door, all the way from Hull! Thoroughly nice bloke too, even though not a 'Wammer!
Been listening to them for the past couple of hours and I have to say: niiiiiiiiiiiice
Frankly, they kick the Berkeleys' arses and leave them crying like girls: the Volts manage pretty much the same bass extension and impact, but do so without the Tannoys' overhang or occasional wobbliness; mid integration is better, while mid and upper texture, tonality and smoothness is a major order of magnitude better, as are artefacts like imaging and soundstaging.
Compared to the Triangles, they lack the midrange bite and bass speed, and are not quite so well integrated top to bottom, but beat them in bass impact and depth, are a little ahead in texture and tonality, and are generally cleaner and more open in the upper treble.
Midrange integration is, naturally, not perfect - but is a lot better than theoretically it should be, and beats the similarly-sized and configured Art Emotions in this area. Another predictable shortcoming is the tendency of the ribbon horns to enhance sibilants in compressed programme material played at high volumes - a typical distortion I've heard in all ribbon treble units I've heard. It's certainly less of an issue here than in the Neat Elites I once owned...
They could do with being mounted 6 - 8" higher than they are too, but that'll be addressed.
At present I'm using them with my Cairn integrated (30W), and they seem to be a very similar load to both the Tannoys (~91dB / 8 Ohms) and Triangles (93dB / 3.3 Ohms), at around 90dB and 8 Ohms.
I won't know if they're keepers until my Electrocompaniet power amp is rebuilt, which is a while away, but for now they are Big Fun