Let’s go crazy and start with the conclusion for once, as the following text on the NuPrime product page pretty much sums up how I feel about this amp:

“NuPrime’s sonic character stands well apart from – and indeed above – the soft, cushy sound we often associate with most tubed amplification and the dry, clinically edgy sound we often associate with solid-state and switching technology. Rarely does an amp achieve an ideal balance of richly textured timbres and harmonics, bottom-end authority, startling dynamics, exquisite low-level detail, and a fully revealed, fully dimensional sound stage against a backdrop of mile-deep silence.”

NuPrime has unraveled those parameters with which they can tailor each product to have unique sonic characteristics. Opinions and personal taste will forever differ, and so there will always be those who want a smoother, creamier, warmer delivery, for example, to add some extra romance to vocals. While the ST-10 is a clean sounding amp, NuPrime also offers creamier sounding amps, should that be desired. The choice is with the customer, and this is quite unique.