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Fosi Audio
Fosi Audio Box X2
~$69
Estimated price · may vary by retailer
The dedicated phono preamp that put Fosi on the map for vinyl lovers. Unlike the X4, it focuses purely on the phono stage without Bluetooth or tone controls, using the tubes as a buffer to add warmth to the RIAA equalization.
Specifications
Tubes6J2 × 2 (Replaceable with 5654W)
TopologyPhono Preamp (MM) + Tube Buffer
InputsPhono (MM) RCA
OutputsRCA
FeaturesAdjustable Gain Settings (39/42/45 dB)
Things to Know
- ⚠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.
Reviews
“The Fosi on the other hand opened up high end detail that I was missing previously and the sound was rich and dynamic... I was impressed and would highly recommend a pre-amp to anyone that's currently using an internal pre-amp.”
— Reddit r/turntables (Mechanical_Cruiser)
“For the money it is a decent pre amp. Certainly better than most pre amps that are built in [to turntables].”
— AudioScienceReview (4Real)
Video Review
▶Sound MattersYouTubeBuy on AmazonBuy on AliExpress
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