A TRUE REFERENCE After Unison Research completed the design of their flagship Reference mono-block power amplifiers, they created a need for a preamplifier with the same features and sound quality. Unison came up with a pre-amplifier design worthy of that series, the Reference PRE. Made with the care and attention detail that characterizes all products from Unison Research, the Reference PRE pre-amplifier is truly another milestone in audio reproduction. Elegance in the Details 2 x Phono Inputs w/Adjustable Gain and Loading Type: tube pre-amplifier, dual mono, three chassis Tube: 2 x 300B, 2 x ECC82, 4 x ECC83, 6 x 6C45P Class: pure class-A Inputs: 4 x line (2 are balanced), 1 x tape, 2 x phono Input impedance: 47 Kohm line inputs, 1 set for phono 1 x unbalanced and balanced, 1 tape (active), 1 x sub woofer (active),2 x remote switch on for power Reference Output Impedance : 500 ohm Volume Control: remote Power Consumption : 320 W max Dimensions: 16.3 w x 22.4 d x 8.7 h in. Weight: 55 lbs. Warranty: 2 yrs. limited electronics, tubes: 30 days Ask about our trade-in program SHIPPING: The shipping weight of the Unison Reference Pre is 60 lbs. Shipment by FEDEX Home Delivery/Insured is FREE if your delivery addresses is within the 48 continental states. If your delivery address is in Alaska, Hawaii, Canada or other location outside of the USA, please call (480) 607-2277) or email [email protected] to determine the shipping cost and to place your order. Duties, taxes and fees on shipments to destinations outside of the USA are NOT included in the price.