Audiophile tube preamplifier for MM and MC cables

A phono preamplifier that uses classic tubes for pure analogue processing of the phono signal.In addition, with the Tube Box S2 you can also change the tubes for the first time and influence the resulting sound character. This micro component is the dream come true for all innovators and experimenters who want to achieve the best analogue sound for their turntable, tailored to their personal preferences.

The Tube Box S2 is the first Pro-Jectt product to feature a fully discrete circuit design without the use of any operational amplifiers (OpAmps) using polystyrene capacitors.The Tube Box S2 will provide a full and relaxed sound with lush mids. It offers support for both MM and MC cartridges and allows you to make adjustments directly from the front panel. There are five variable input impedance settings to accommodate any MM cartridge, and the 47 kOhm input impedance setting is fixed and suitable for high output MC cartridges.

The tube preamplifier for MM and MC (high output or low output) cartridges is equipped with proven ECC 83 tubes (12AX 7A). It allows for infinite adjustment of input impedance, non-adjustable input capacitance and also gain.

ADVANTAGES

• - Suitable for both MM and MC transmissions
• - Precise RIAA equalization - passive/active
• - Fully discrete circuit design with no operational amplifiers
• - 2 x ECC83 tubes (interchangeable)
• - Front panel button to activate subsonic filter
• - Front panel gain adjustment
• - FET circuits with extremely low input phase noise
• - Dual mono circuits for optimized channel separation
• - Polystyrene capacitors
• - Gold-plated RCA inputs and outputs
• - External power adapter and multiple internal power supplies
• - Filtered high voltage anode power supply
• - Sandwich aluminum/metal housing to protect against vibration and electromagnetic interference

LINKS

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TECHNICAL SPECIFICATIONS

• Tubes: 2 x ECC83 (12AX 7A)
• Input impedance: 10 Ω, 100 Ω, 1 kΩ, 2 kΩ
• Input capacitance/impedance: 47 pF, 147 pF, 267 pF, 367 pF, 487 pF and 587 pF*/47 kΩ, along with other input impedance settings without any influence!
• Input Gain: 40 dB, 43 dB (MM) and 50 dB, 60 dB and 63 dB (MC)
• Noise Threshold: 80 dB (A weighted) at 40 dB input gain, 75 dB (A weighted) at 50 dB and 63 dB input gain
• THD: < 0.02% at 40 dB input gain, < 0.05% at 50 dB and 63 dB input gain
• RIAA equalization curve accuracy: +/- 0.4 dB / 20 Hz - 20 kHz
• Subsonic filter: 18 dB/octave at 20 Hz
• Input: 1 pair of RCA/phono jacks
• Line Output: 1 pair of RCA/phono jacks
• External power supply: 18 V / 1000 mA DC, suitable for mains power in your country
• Power consumption: 470 mA DC, < 1 W in standby mode
• Dimensions: W x H x D 103 x 73 x 131 mm (with sockets)
• Weight: 410 g without power supply