PROJECT OPTICAL BOX E PHONO

MM phono stage with A/D converter and line input/output

The Optical Box E Phono is a multi-purpose phono preamplifier featuring A/D conversion and dual output, both analog and digital optical. Designed for those who want to connect a turntable to devices with only digital inputs—such as home cinema receivers, soundbars, or all-in-one systems—this compact yet powerful accessory provides a versatile and effective solution.

Thanks to its dual simultaneous output, it allows the same signal to be sent to two different systems at the same time, acting as a true 1>2 splitter. Additionally, it can function as an input expander for devices with limited connectivity, supporting both phono and line-level signals from sources such as tape decks or radio tuners. The high-precision A/D conversion with 24-bit / 96 kHz resolution ensures a faithful reproduction of the original signal, preserving every sonic detail.

It can also be used as a traditional MM phono preamplifier with an analog 3.5mm jack output, making it easy to integrate into any Hi-Fi system. An internal metal shielding protects the circuits from RF interference and vibrations, ensuring an undisturbed listening experience. With its compact design and availability in black or white finishes, the Optical Box E Phono is the ideal companion for those who want to enjoy their analog sources with both digital and analog playback systems.

Technical specifications:

• Input impedance: 47 kΩ
• Input capacitance: 120 pF
• Gain: 40 dB
• Output voltage (typical): 500 mV @ 1 kHz with 5 mV input
• Noise floor: 88 dB (A-weighted)
• Total harmonic distortion (THD): <0.04%
• RIAA equalization accuracy: 20 Hz – 20 kHz (+0.5 / -0.2 dB)
• Inputs: 1 pair of RCA connectors
• Outputs: 1 pair of RCA connectors
• External power supply: 18V / 500mA DC; 220 - 240V, 50Hz
• Standby power consumption: <1 W
• Power consumption: 20 mA DC
• Dimensions (W × H × D, D with connectors): 120 × 32 × 100 (115) mm
• Weight: 250 g (without power supply)