Head Box RS is a reference quality headphone amplifier with fully balanced tube input stage (double triode tube 6922) and single ended, class A „FET (Field Effect Transistor)“ output stage. It offers balanced and unbalanced input as well as balanced and un-balanced by-pass connectors for using the pass-through input signal with other components. Volume control consists of a precise volume regulator with matched resistance between left and right channel. A special output impedance selector allows to adjust output impedance in three steps 5, 20 and 50 ohms to achieve better im-pedance matching between amplifier and headphones. Some experiments with different positions of output impedance selector are highly recommended to get the ultimate sound experience for your headphone. An advanced multi-stage power supply with four different output voltages is used to achieve the best possible S/N ratio for out-standing reproduction of detail, dynamics and imaging with any dynamic headphone. Features:- • Fully balanced double mono design • Tube input stage • Class-A FET output stage • Switchable output impedance for ultimate performance • Superior low distortion • Low noise components for ultimate dynamic & detail • Output: 6,3mm socket • Full metal casing in silver or black • Optional Upgrade: Linear power supply Power Box RS Uni 1 (or 4) for further improved sound quality Specifications:- Line-level input/output 1 pair RCA/phono and 1 pair XLR each Headphone jack 3-pole 1/4 ‘‘ (6,3mm Ø) Power output 350mW / 32 ohms, 60 mW / 300 ohms Crosstalk -58dB Signal-to-noise -99dB Frequency response 30Hz – 20kHz/(+0,2dB; -0,05dB) THD (IMD) 0,17% (XLR in, output impedance setting 5 ohms, load 32 ohms) Gain 9dB Outboard power supply 20V/3A DC suitable for your country's mains supply Power consumption 1,3A DC Dimensions W x H x D 206 x 72 x 200 (209) mm (D with sockets) Weight 2150g (without power supply)
