"...the sound we heard through the different speakers that accompanied the DIA-400S was, at all times, powerful, defined, and with excellent clarity and detail. The amplifier had no problems handling any of the different models and, especially, presented favorable attributes in all of them regarding stage width, control and power in bass, tone, and good handling of high frequencies. Without quite having a 100% neutral or analytical sound, the DIA-400S showed detail and some musicality, which allowed for prolonged listening without fatigue."

Fernando, Et Sona