[quote="Pedja"]Unbuffered output sounds more natural but in most cases it lacks the dynamics of the buffered output.
I would actually bet that any transformer will work better with 15 Ohm than 1 kOhm + source.[quote]
Since TDA1541A sounds natural in nonos to my ears, and as per your recommendation, I've decided to use buffered output...Sound very good (at least in (pair with heavily tweak Marantz CD14 with balance IC to amp), but I hope to squeeze more from it with new super-shunt regulators. Thank you!