THX Ltd. / Conventional Class AB / Lucasfilm Ltd. / UNBALANCED LINE INPUT 1 BALANCED LINE INPUTS HF / SENSE POWER RING (POWER = WHITE OVERLOAD = RED) POWER SWITCH (FRONT PANEL) HF / ACOUSTIC SPACE LOW FREQ WHOLE HALF QUARTER HF / LOUD Technologies Inc. / Class AB / RCA / dBu LOUD Technologies / /