The Thorens HP 303 is a loudspeaker model manufactured by Thorens, produced from 1974 to 1978 in Germany. It was priced at approximately 480 DM at the time of its release. The HP 303 is part of a series that includes models HP 302 and HP 304, indicating a range of product offerings with potential variations in specifications or design. The design philosophy of Thorens typically blends functional aesthetics with high-quality sound reproduction, making their speakers suitable for various audio applications.