Here is a link to the Eros Tape preamp info page in the Bottlehead store -
Eros Tape(https://forum.bottlehead.com/proxy.php?request=http%3A%2F%2Fbottlehead.com%2Fwp-content%2Fuploads%2F2014%2F01%2Feros_tape_head_preamp.jpg&hash=6f1e2c24854fb8baae1906a4bde733302a72aab5)