High-End Audio Buyer’s Guide 2024: Atma-Sphere S-30 Mk 3.3

$5100

The Mk 3.3 version of this 30Wpc Circlotron OTL amplifier nudges performance higher in dynamics and soundstage transparency. Although guilty of slight timbral alterations and a somewhat dark tonal balance, these acts of commission, likely due to load interactions, point out the need for a compatible loudspeaker and front-end electronics. The S-30 strikes an intelligent balance between quality and quantity, focusing as it does on delivering a strong first watt. Its asking price is a small price to pay for a generous slice of musical heaven. (261)