The line stage preamplifier with both active and passive single paths. Four line level inputs including one tape loop. External Power Supply (not a wart). Dimensions :9.5w x 3h x 9d. The preamp is in excellent condition, no scratches, ding etc. Looks beautiful and musicality is open and transparent. In September 2002 Steve McCormack went through the active circuit upgraded and now is a higher resolution sound. The right knob is not usable now. The middle knob is a TKD volume stepped attenuators. I am the original owner and I have the invoice 9-4-2002 upgraded, new $1484.52. I do not have the original box or manual. It will be packed very well for safe shipping. Original accessories:power cord and electric line for the power supply. Thank you for your time.