Fosi Audio SK02 : Neutral and Powerful

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+Neutral sound signature

+Crystal clear sound output

+Multifunctional volume knob

+Powerful power output

+3.5mm SE and 4.4mm Balanced terminations

+Built like a tank

+Plug and play dac/amp

+Great technicalities

 

-Features like software app for volume control (subjective)

-Kind of bulky

 

 

INTRO

 

SK02 is a DAC/AMP offers portability and high power output driving music gear with ease. It a simple plug and play source which uses 3.5mm and 4.4mm Balanced terminations. The multifunctional volume knob is huge plus for a portable DAC/AMP you can adjust the volume to your liking in a most convenient way.

 

Disclaimer

 

I would like to thank Fosi Audio for arranging a unit for me. My opinions are unbiased, and I haven't been influenced or instructed to praise these gear. Every detail in this review is actual experience made by listening for hours everyday.

 

 

 

Specifications

 

Model : SK02

Input :  USB/OPT

Output : 3.5mm Headphone,4.4mm Headphone,3.5MM line out/OPT

Amp output maximum power

 

3.5MM :

 

High Gain: 280mW@32Ω, 130mW@64Ω, 40mW@250Ω, 30mW@300Ω

 

Low Gain: 90mW@32Ω, 50mW@64Ω, 15mW@250Ω, 10mW@300Ω

 

4.4MM :

 

High Gain: 1100mW@32Ω, 550mW@64Ω, 150mW@250Ω, 120mW@300Ω

 

Low Gain: 350mW@32Ω, 180mW@64Ω, 50mW@250Ω, 40mW@300Ω

 

Frequency Range 20Hz-20kHz (±0.02dB)

 

THD ≤0.001% @ 1kHz

 

SNR  :

3.5mm Headphone :

Low Gain:116dB

 

High Gain:120dB

 

 

4.4mm Headphone :

 

Low Gain : 110dB

 

High Gain : 115dB

 

Headphone matching impedance 16-300Ω

 

PC-USB Sampling Rate 32Bit/384KHz DSD256

 

OPT Sampling Rate 24Bit/192KHz

 

DAC Chip ES9038Q2M

 

Device Dimension 4.76*2*1.69inch (121*51*43mm)

 

Net Weight 0.84lb/380g

 

Power Supply 5V, USB Type-C

 

 

 

Packaging

 

Fosi Audio Sk02 Headphone Amp

2-in-1 USB-A/C to C Cable

User’s Manual

 

 

Build and features

 

The build is made from aluminum CNC ensures solid durability and long lasting use.

 

The Multifunctional volume knob serves as volume adjustments, play/off button and to turn on/turn off the SK02.

 

It also features low/gain mode buttons for quick switching to your liking

 

The light indicator helps the user to determine the sampling rate of songs.

 

The high power output of SK02 whooping 1100mw driving mostly of your gears with ease.

 

 

Sound Aspects

 

Fosi Audio SK02 sounds neutral and analytical. Bass is clean and well- controlled it has enough punch and texture. I just want to emphasize the highs have more bite lowering the volume help this department. Technicalities is above average for the asking price. It picking up enough micro details and nuances as well as creating wide stage performance.

 

 

Source used :

 

Rosetechnics Quietsea

Tangzu Xuan NV

EPZ Q1 Pro

Letshuoer DZ4

 

DDHIFI TC05 Cable

Stock Cable

 

This DAC spend 30-40 hours of burn in before taking details of this review

 

 

Pairing

 

 

 

With Rosetechnics Quietsea

The bass shows tactility and more punch. The V shape tuning of quietsea affects the mids become recessed but with sk02 it helps the mids to make more frontal presentation. As for the highs it has more bite and crisper quality

 

With Tangzu Xuan NV

It is a neutral-warm tuning benefits more with this SK02. It shows more controlled and textured bass. Mid is smooth and lusher. Vocals is airier and more intimate. Treble is still safe and engaging enough to enjoy the presentation.

 

L

 

With EPZ Q1 Pro

Another harmanish tuned gear synergized well with SK02. It has already full sounding bass but when paired the bass takes it to another whole new level. It is tighter, punchier and well controlled. Mids is airer and more frontal. Treble is livelier and engaging. The technicalities have noticeable improvement such as imaging snd layering.

 

 

 

Letshuoer DZ4

A neutral gear which focuses vocal clarity. It has clean and coherent sounding bass which not appealing to everyone. The mids is the star of the show here the techs of SK02 helps this department. The vocals is lusher, airer and more intimate presentation. Also it helps the treble of DZ4 a little livelier.

 

 

 

Conclusion

 

The SK02 is a versatile DAC/AMP that you can carry on the go or some desktop setup. This is the most powerful DAC/AMP I've used in this price range whooping 1100mw which is crazy imo whatever your gears is. I'm easily recommend this SK02 for those people who looking for a budget decent desktop setup.

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