Blue Circle Audio The SBT Tube Linestage Preamp with separate power supply. 2 sets of RCA inputs, 1 set of RCA outputs.  

Uses two 6922 tubes, operates perfectly, excellent sonics as is typical for Blue Circle Audio (Blue Circle gear still has designated service centers, although I've never had a single issue).

Will ship in box with custom padding for safe delivery.

All technical info can be found here:

https://www.tlp-audio.com/preamps.php

Review with comparisons:

https://positive-feedback.com/Issue34/bluecircle_sbm.htm