As is often the case, it was when I began to experiment a little with the individual units that I became more appear to be a mismatch. But in practice, the Ref 110 is a very special amplifier – and the 17 allows that quality to shine, which given the price differential is impressive indeed. Individually excellent, together they offer a finely honed balance, a genuinely musical, heartfelt performance that slips in surreptitiously and gets right under your skin.