pro ject phono box s3 bPRO JECT PHONO BOX S3 B BALANCED AUDIOPHILE PHONO PREAMPLIFIER The Phono Box S3 B is a fully balanced phono preamplifier developed for audiophiles who want maximum flexibility and uncompromising sound quality for both MM and MC cartridges. With a newly developed cabinet, front mounted settings, and advanced discrete circuit design, the S3 B sets a new standard in its price class HIGHLIGHTS 5 pin mini XLR input for balanced connection Balanced XLR