I went to audit Marten Coltrane today, my friend is right, Coltrane and Contriva are two completely different animals even they use similar Accuton units and diamond tweeter. And they are in same price range. Physically, Coltrane is much smaller than Contriva, about 2/3 the size.
My friend use ASR Emitter I integrated amp for Coltrane, I heard Emitter once with other speakers, I don't know how much the electronics affect the sound, what I heard base on the combination, Coltrane is vivd, airy, EXCELLENT image. Contriva has been discuss enough in this thread, high density, a bit conservative in treble, yet all details are there, in its own understated way to interpret musician / singers' elaborations. Maybe sacrifice a bit of pinpointing capability.
If you asked me which one I would choose, haha , you know the answer, Coltrane is an amazing speaker, but it lacks some qualities I considered the most important -- involvement, maybe ASR is not a proper match to Coltrane, or maybe wires are not right, violin sounds awful and piano sounds artificial to me. The vocal and soundstage are defiantly in very high class category, but something is missing,,,..intimacy, yes, it is the word I want to use.