Fosi Audio Box X2vsMusician Monoceros
A detailed side-by-side comparison of the Fosi Audio Box X2 and Musician Monoceros — two popular preamps in the Chinese HiFi space.
Specifications
Spec
Fosi Audio Box X2
Musician Monoceros
Tubes
6J2 × 2 (Replaceable with 5654W)
—
Topology
Phono Preamp (MM) + Tube Buffer
Class A Discrete
Inputs
Phono (MM) RCA
2 × XLR, 1 × RCA
Outputs
RCA
XLR, RCA
Features
Adjustable Gain Settings (39/42/45 dB)
—
Volume
—
R-2R Resistor Ladder (60 steps)
Weight
—
7 kg
Remote Control
✗
✓
Tube Stage
✓
✗
Phono Stage
✓
✗
Headphone Amp
✗
✗
Price (estimated)
Price
~$69
~$1169
Difference
~$1100.00 cheaper (Fosi Audio Box X2)
Things to Know
Fosi Audio Box X2
- ⚠No power switch on the front (toggle switch is on the cable or back depending on revision).
- ⚠Stock tubes (6J2) are often microphonic; upgrading to GE 5654W or Riverstone tubes is almost mandatory.
- ⚠Can introduce hum if placed too close to power amplifiers or WiFi routers.
Musician Monoceros
- ⚠Volume relays make a clicking sound when adjusting level (normal for R2R but can be surprising).
- ⚠Runs warm due to Class A operation.
- ⚠Display is retro LED style which some find outdated compared to OLED.
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