Three-block phono corrector-preamp Lamm LP1. Dual mono tube preamp with two separate neutral power sources equipped with full-wave vacuum rectifiers, choke filters, high-voltage vacuum lamp regulators, solid-state analog non-switchable low voltage regulators used as heater power sources. Lamp set: two-6C3P (6C3P), two-6C45P (6C45P) and (phono corrector); four-12AX3/12 BE3, two-6C19P (6C19P), two-6AK5, two-5651A (power supply).