Designed by John Curl - creator of the legendary Vendetta Research phono preamp. Inputs and outputs use Vampire brand 24k gold-plated RCA jacks. Balanced outputs use Neutrik brand premium XLR jacks. MM 47k ohm, MC 47k ohm or MC variable 50-550 Ohms. RIAA accurate within 0.2 dB.Exclusively Vishay-Dale resistors in the audio path. Triple shielding; low-carbon mild steel partitions isolate the power supplies & AC wires. Dual mono design; each audio channel is separately enclosed in its own extruded aluminum enclosure. Separate high speed-soft recovery rectifiers, filter caps and voltage regulators for each channel. Mono switch can improve sound of mono and older LPs. Built-in AC line conditioner to prevent AC noise from polluting the circuits. AC polarity reverse switch can reduce hum in many systems. Non-magnetic aluminum rear panel for purest sound. Turn On Options switch: manual or auto with 12v trigger input. Premium detachable heavy gauge IEC AC cord. (on the gross total of the items cancelled from the order). This item is in the category "Consumer Electronics\TV, Video & Home Audio\Home Audio\Receivers & Amplifiers\Receivers". The seller is "wholesalevip13" and is located in this country: US. This item can be shipped to United States.