“How does the U4PRE stack up to a well-thought-out valve preamplifier…? Exceedingly well and is, in fact, preferable in comparison. This is by far the best solid-state internal preamplifier I’ve heard yet. Putting both the U4PRE and U500DC together, you get the very essence of a phenomenally explosive and powerful sounding combo of sonic magnitude.”

“Both Ultra Sigma models have clearly been developed over time in a considered way, meaning what you get is a well thought out and finely executed package. Given the quality of these products, I expect we’ll be seeing and hearing a lot more from Ultrafide Audio in the future.”

“We can see the Ultrafide U4PRE and U500DC amplifiers winning many fans for build, design and sound quality. This combination could be the one that puts Devon firmly on the map for hi-fi and music lovers.”