Pro-Ject Phono Box S3 B Phono Preamplifier and X2 B Turntable Preview Gene HopstetterOctober 19, 2022 The good people at Pro-Ject have sent me a Phono Box S3 B phono preamplifier and an X2 B turntable for review. The “B” at the end of those model names indicates that they are part of Pro-Ject’s new True Balanced Connection line of components. NewsProduct Previews