Pro-Ject Head Box RS Reference Quality Headphone Amplifier in excellent condition with all packaging and power supply. This is a high end headphone amplifier which works well with both dynamic and planar headphones. It can also be integrated into your main system with ease as there are balanced and unbalanced inputs and outputs. Features include:
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 toadjust output impedance in three steps 5, 20 and 50 ohms to achieve better impedance 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. Technical Specifications: Line-level input/output: 1 pair RCA/phono & 1 pair XLR each Headphone jack: 3-pole 1/4 ‘‘ (6,3mm Ø) Power output: 330mW / 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)