Tube Box DS2 – High-End Tube Phono Stage with Dual Inputs and Precision Control
The Tube Box DS2 is a premium tube phono preamplifier engineered by Dr. Bohumil Sykora, designed to deliver exceptional sonic performance. Handmade in Europe, it supports both MM and MC cartridges and features two separate phono inputs, letting vinyl enthusiasts easily switch between two turntable setups. With continuously variable impedance for MC cartridges, selectable capacitance for MM cartridges, and a switchable subsonic filter, the DS2 allows detailed system matching and fine-tuned control. Built with audiophile-grade components including ECC83 tubes and polypropylene capacitors, this unit offers refined analog sound and serious flexibility in a sleek, vibration-resistant chassis.
Key Features
- Compatible with MM and MC cartridges
- Dual phono inputs and dual RCA outputs for flexible setups
- Continuously adjustable input impedance for MC cartridges
- Selectable input capacitance for MM cartridges
- Switchable subsonic filter for cleaner playback
- Ultra low noise and dual mono circuitry for superior channel separation
- Accurate RIAA equalisation curve (+/- 0.2 dB)
- Gold-plated RCA input and output sockets
- High-grade ECC83 tube output stage
- Robust aluminium/metal sandwich casing
- Available in silver or black, with or without wooden side panels
- Hand-assembled in Europe with audiophile-grade components
Technical Specifications
| Specification |
Details |
| Tubes |
2 x ECC83 (12AX7A) |
| Input Impedance |
Variable 10–1000 ohms / Fixed 47 kΩ |
| Input Capacitance |
47pF, 147pF, 267pF, 367pF |
| Gain |
40 dB, 45 dB, 50 dB, 60 dB, 65 dB (switchable) |
| Output Voltage (typical) |
500 mV at 1 kHz with 5 mV input at 40 dB gain |
| Noise Floor |
88 dB (A weighted, at 40 dB gain) |
| Total Harmonic Distortion (THD) |
<0.04% |
| RIAA Equalisation Accuracy |
20 Hz – 20 kHz / +0.2 dB / -0.2 dB |
| Inputs |
2 pairs RCA/phono sockets |
| Outputs |
2 pairs RCA/phono sockets (line-level) |
| Power Supply |
18 V / 1000 mA DC (external) |
| Power Consumption |
490 mA DC, <0.5 W in standby |
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