I haven't done a Bottlehead kit for a while, but need an active pre-amp between my MusicStreamer II+ and Type 45 power amp en route to Audio Note AX Two Signature speakers in my desktop system. The passive vol. pot just wasn't cutting it. I suspect it will see service with my Otari 5050 & EROS, too. Can't wait! (Well, I can, and will, but, awww, ya know what I mean!)