Fosi Audio SK02 – Desktop DAC & Balanced Headphone Amplifier

Fosi Audio SK02 – Desktop DAC & Balanced Headphone Amplifier

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Compact Yet Powerful: The SK02 employs a minimalist and stylish design language. Despite its small size, it boasts mighty features.... Read more

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    Description

    • Compact Yet Powerful: The SK02 employs a minimalist and stylish design language. Despite its small size, it boasts mighty features. It supports DSD256 and PCM 32bit/384kHz high-resolution decoding, along with 3.5mm single-ended and 4.4mm balanced headphone outputs. Its robust power can easily drive a wide range of headphones and IEMs with an impedance range of 16-300 ohms.

    • Stunning Performance: It features a high-end ESS SABRE ES9038Q2M DAC and SGM8262 op-amps. Its excellent circuit design ensures superior parameters with a SNR as high as 120dB, a low noise floor of only 3.7μV, and an incredibly low THD of 0.001%. The 4.4mm balanced output power reaches an impressive 1100mW at 32 ohms. The exceptional high-resolution capability and pure sound quality make every listening experience an extraordinary sensory journey.

    • User-Friendly Design: The SK02 requires no drivers and offers plug-and-play convenience. It integrates a big multi-functional control knob, allowing easy access to power on/off, play/pause, and volume adjustments. The unit features quick-switch buttons for high/low gain and input modes. Additionally, its colorful indicator lights enable effortless identification of the current working mode and the song's sampling rate.

    • Remarkable Versatility: Supports USB and optical input, widely applicable for decoding with computers, laptops, CD players, TVs, and projectors. Not only can it function as a headphone amplifier, but it can also serve as a preamp, pairing with active speakers or an amplifier like Fosi Audio V3, ZA3, TB10D amp, and passive speakers to form a desktop listening or home audio system.

    • Exquisite and Durable: The SK02 is crafted from a single piece of aluminum alloy using CNC machining and a delicate sandblasting process. This not only gives it an exquisite appearance but also ensures lasting durability. In addition, Fosi Audio pledges to provide a 24-month worry-free warranty and responsive customer service to all users.

    Specifications

    • Weight: 200gr
    • Usage: Indoor & outdoor

    Pros and cons

    • Sustainably produced
    • Ideal for everyday use
    • May discolor in direct sunlight

    Productdetails

    • Compact Yet Powerful: The SK02 employs a minimalist and stylish design language. Despite its small size, it boasts mighty features. It supports DSD256 and PCM 32bit/384kHz high-resolution decoding, along with 3.5mm single-ended and 4.4mm balanced headphone outputs. Its robust power can easily drive a wide range of headphones and IEMs with an impedance range of 16-300 ohms.

    • Stunning Performance: It features a high-end ESS SABRE ES9038Q2M DAC and SGM8262 op-amps. Its excellent circuit design ensures superior parameters with a SNR as high as 120dB, a low noise floor of only 3.7μV, and an incredibly low THD of 0.001%. The 4.4mm balanced output power reaches an impressive 1100mW at 32 ohms. The exceptional high-resolution capability and pure sound quality make every listening experience an extraordinary sensory journey.

    • User-Friendly Design: The SK02 requires no drivers and offers plug-and-play convenience. It integrates a big multi-functional control knob, allowing easy access to power on/off, play/pause, and volume adjustments. The unit features quick-switch buttons for high/low gain and input modes. Additionally, its colorful indicator lights enable effortless identification of the current working mode and the song's sampling rate.

    • Remarkable Versatility: Supports USB and optical input, widely applicable for decoding with computers, laptops, CD players, TVs, and projectors. Not only can it function as a headphone amplifier, but it can also serve as a preamp, pairing with active speakers or an amplifier like Fosi Audio V3, ZA3, TB10D amp, and passive speakers to form a desktop listening or home audio system.

    • Exquisite and Durable: The SK02 is crafted from a single piece of aluminum alloy using CNC machining and a delicate sandblasting process. This not only gives it an exquisite appearance but also ensures lasting durability. In addition, Fosi Audio pledges to provide a 24-month worry-free warranty and responsive customer service to all users.

    <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
      <h1>Premium Sound, Audiophile's Choice</h1><p>The SK02 is a headphone amplifier with built-in decoding functionality, designed foruniqueness and practicality, lt is equipped with a multifunctional volume control knob.separate gain and mode selection buttons. Get the best performance out of yourheadphones.</p>

        Premium Sound, Audiophile's Choice

        The SK02 is a headphone amplifier with built-in decoding functionality, designed foruniqueness and practicality, lt is equipped with a multifunctional volume control knob.separate gain and mode selection buttons. Get the best performance out of yourheadphones.

        • Input: USB, OPT
        • Output: 3.5mm single-ended, 4.4mm balanced, 3.5mm AUX/OPT
        • Max Power Output: 3.5mm: 280mW@320, 4.4mm: 1100mW@320e
        • Terminating Impedance:16-3000
        <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
          <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
            <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
              <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
                <p>TRIBUTE TO CLASSICS</p><h2>MC351 2.1 Channel Integrated </h2><h2>Amplifier with VU Meter</h2><p>Equipped with a built-in DAC, the MC351 supports four types of digital </p><p>inputs. With outputs of passive subwoofer and pre-out, it allows 2.1 system </p><p>configuration. The inclusion of a circular VU meter adds a touch of vintage </p><p>aesthetics, providing audio enthusiasts with visual and auditory pleasure.</p>
                  • Gain and input Mode Switches

                    Gain and input Mode Switches

                    Equipped with dedicated buttons for high/low gain and input source, a simple touch switch settings, crafting perfect sound.

                  • Supports Optical & usB Input

                    Supports Optical & usB Input

                    Efficient connectivity and clear transmission for seamless high-resolution audio, ushering in a new era of high-quality audio transmission.

                  • 3.5mm AUX/0ptical Design

                    3.5mm AUX/0ptical Design

                    Dual enjoyment in one: The seamless fusion of AUX and optical outputs provides a professional audio experience for various devices

                  • Solid Aluminum Alloy Knob

                    Solid Aluminum Alloy Knob

                    Precision-engineered for durability and reliability providing a smooth and comfortable operation alexperience.

                  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
                  What‘s in the box？
                  Item Quantity Fosi Audio Sk02 Headphone Amp x 1,
                  2-in-1 USB-A/C to C Cable x 1,
                  User’s Manual x 1

                  FAQs

                  How to: Choose the right banana plug?
                  • Closed Screw Type. All Fosi amplifiers use standard-sized speaker terminals (4mm pins).
                  • Easy to wire up and solidly connect to amplifier and passive speaker.
                  • If they do not fit, use a little force to tighten the plugs.
                  • Fosi Audio Banana Plugs (Copper, Silver/Gold Plated): http://bit.ly/40Djq0U, https://bit.ly/3MkPL8t
                  • Please watch tutorial videos: https://youtu.be/6pYhoqDlvNw / https://youtu.be/RGvBgGAwS9k
                  How to Diagnose Power Supply Failure?
                  • The following situations may cause this issue
                  • Case 1: The LED on the power supply does not light up; Case 2: Amp/Preamp does not turn on; Case 3: When plugged into the Amp, both light on the amp & power supply start blinking; Case 4: Amp/Preamp make noise; Case 5: Sound shuts off by itself
                  • Possible solution
                  • Check if the power supply is illuminated when plugged into AC by itself.

                    Plug power supply into a different socket.

                    Test the adapter with a meter.

                    Try a different power supply (within a range of DC input).

                    Test the included power supply on other electrical equipment.

                    Please watch the tutorial video by clicking on the link provided. https://youtu.be/yCjygS03zTE
                  What are the differences in power outputs using the 32V and 48V power supplies?
                  • Using a more powerful power supply can help prevent distortion.
                  • Enables amplifier to drive larger, more powerful, or higher-impedance speakers.
                  What is a GaN?
                  • The GaN supply has a power output of 240W.
                  • Offers overload and over-temperature protection.
                  • The 48V 5A GaN power supply is also available on Amazon.

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