It seems like a lot longer, but a little under a year ago I posted here
in a SAS B10 vs dH thread (saying 'vs' sounds confrontational, but this was one of the best examples of comparative discussion I've seen in hifi) to say I had bought a B11a.
I'm not going to offer an in-depth review here, but I am very, very pleased. When we were in the UK, it worked flawlessly. Since we have moved to NZ, I now have some hum through the speakers, but whether this is mains-borne or something else I've not yet investigated.
Irrespective, I am now in the awkward position of knowing
that my speakers are the weak link in my system.
The B11a was compared to a Coincident Line Stage (custom built at significant cost), an Audio Analogue Bellini, a Modwright LS36.5, and (back-to-back) a Shindo Aurieges. I'd not swap the B11a for any of the others.
Shindo kit is something I have always loved listening to. Still do. But the B11a really did show the Aurieges how it's done; even the local retailer commented, in a voice loaded with astonishment, "good grief, that's fast
!" The B11a wasn't just fast though, it was detailed and clear. The Aurieges really did sound lovely in isolation, but I certainly prefer the B11a.
I cannot comment on comparisons with the dH, for example, but I'm unconcerned that other preamps can add (desirable or otherwise) colour or atmosphere to reproduction. I use DIY tube power amps, and can get all the colour I'll ever need from them!