Pro-Ject Head Box RS

High End Hearing Amplifier with tubes on the input stage and fully symmetrical dual-mono design

Head Box RS is a reference quality headphone amplifier with a fully symmetrical input tube stage (6922 dual triode tubes) and a Class A"FET (Field Effect Transistor)" output stage.It offers symmetrical and un-symmetrical input as well as symmetrical and un-symmetrical by-pass connectors to pass the input signal to other system components.

Volume level control is controlled by a precision regulator with matched resistance between the left and right channels.

A dedicated output impedance selector allows the output impedance to be adjusted in three steps of 5, 20 and 50 ? to achieve the best possible impedance match between the amplifier and headphones. We recommend experimenting with different positions of the output impedance selector to obtain the perfect listening experience with specific headphones.

An advanced multi-stage power supply with four different output voltages is used to achieve the bestthe best possible signal-to-noise ratio and for superior reproduction of detail, dynamics and space with any dynamic headphones!

FEATURES

• High end headphone amplifier with tube input stage (dual triode 6922 )
• Fully symmetrical dual-mono design.
• Class A FET transistor end stage
• Dedicated output impedance selector with three levels (5, 20, 50 for l ?) for perfect matching of the amplifier with headphones
• Excellent ultra-low distortion values
• Low-noise components for maximum dynamics and detail

TECHNICAL SPECIFICATIONS

• Line input/output:1 pair RCA + XLR / 1 pair RCA + XLR

• Headphone connector:3-pole 1/4'' (6.3 mm jack)

• Output power:350 mW / 32 Ω, 60 mW / 300 Ω

• Overhearing:- 58 dB

• Signal-to-noise ratio:- 99 dB

• Frequency range: 30 Hz - 20 kHz / (+0.2 dB; -0.05 dB)

• THD + N Total Harmonic Distortion: 0.17% (XLR, output impedance setting 5 Ω, load 32 ohms)

• Gain:9 dB

• Dimensions W x H x D: 206 x 72 x 200 (209) mm (H with sockets)

• Weight: 2150 g (without power adapter)