Fosi Audio SK01vsTopping Pre90
A detailed side-by-side comparison of the Fosi Audio SK01 and Topping Pre90 — two popular preamps in the Chinese HiFi space.
Specifications
Spec
Fosi Audio SK01
Topping Pre90
Tubes
—
—
Topology
Solid State Op-Amp
Solid State / NFCA Modules
Inputs
3.5mm Line In
XLR (Balanced), RCA
Outputs
3.5mm Line Out, 3.5mm/6.35mm Headphone
XLR, RCA
Features
Hardware Loudness Switch, 3-Band EQ, High/Low Gain
Relay Volume Control, Remote Control, Optional Input Extender (Ext90)
S/N Ratio
—
124dB
Remote Control
✗
✓
Tube Stage
✗
✗
Phono Stage
✗
✗
Headphone Amp
✓
✗
Price (estimated)
Price
~$70
~$309
Difference
~$239.00 cheaper (Fosi Audio SK01)
Things to Know
Fosi Audio SK01
- ⚠Built-in battery is unnecessary for a desktop unit and will eventually degrade/fail.
- ⚠Input is limited to a single 3.5mm jack (no RCA inputs without adapter).
- ⚠Form factor is tall and narrow, making it easy to tip over when heavy cables are attached.
Topping Pre90
- ⚠Input impedance is relatively low (10kΩ balanced), which may not pair well with some vintage tube sources.
- ⚠Remote control range is narrow and requires precise pointing.
- ⚠Sound can be perceived as 'lean' or 'dry' by those used to colored preamps.
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