Astell&Kern ACRO CA1000 Headphone Amplifier

1 Year Local Singapore Warranty.



Powerful Audio Anywhere



Powerful Audio Anywhere, CA1000

Introducing the Astell&Kern CA1000 Carryable Headphone Amp.

The ACRO CA1000 is a headphone amplifier that combines the functions and portability of a high-performance amplifier and DAP based on Astell&Kern's fundamental philosophy of delivering original sound.

The ACRO CA1000 sets a new standard for headphone amplifiers, providing powerful and clear sound with the features never available on any other headphone amplifiers.


  • Powerful headphone amplifier with digital audio player capabilities.
  • Features a four step Gain Level that drives high impedance headphones with a 15Vrms output or below.
  • Features 3.5mm, 6.35mm unbalanced, and 2.5mm 4.4mm balanced headphone output to handle a wide variety of headphones.
  • An array of digital/analogue inputs and outputs ensures it can at the heart of any hi-fi set-up.
  • Onboard ESS ES9068AS Quad-DAC delivers a clear, detailed and balanced sound.
  • Supports high-resolution audio playback up native DSD512 and 32bit/384 kHz.
  • Crossfeed reduces listening fatigue by creating a more natural sound akin to listening to speakers.
  • Boasts Astell&Kern’s patented TERATON ALPHA Sound Solution technology
  • A 4.1-inch, 720 x 1280px touchscreen tilts up to 60 degrees for easy control
  • Support for Bluetooth® 5.0 provides greater range and a more stable wireless connection
  • Support for 24-bit aptX™ HD and LDAC codecs, offers the best possible wireless sound quality.
  • Built-in battery provides up to 10.5 hours playback.


    Perfectly drive any headphone/IEM
    with 4 levels of gain and up to 15Vrms output

    In order to perfectly drive the most sophisticated headphones, a device must be able to fully deliver output that matches the characteristics of the headphone.

    ACRO CA1000 supports 4 levels of gain settings so that almost any existing headphones can be driven to an optimal state.

    The gain setting circuitry implemented in the CA1000 can drive even high-impedance headphones without degrading the sound quality using a max output of 15Vrms.

    The ACRO CA1000 unlocks the potential of headphones for a fully immersive experience.


    Supports a wide range of inputs/outputs

    ACRO CA1000 features a variety of outputs that can be used by everyone from general users to audiophiles.

    3.5mm, 6.35mm Unbalanced, 2.5mm and 4.4mm Balanced output jacks are available to accommodate a variety of headphones/earphones.

    The ACRO CA1000 can be used as a Hi-Fi audio system by connecting devices using a variety of digital inputs/output (Optical, Coaxial, Type-C USB) and analog inputs/outputs (RCA).

    All Input/output settings can be easily and conveniently selected using the CA1000 touch screen.

    *When using with headphones/earphones, there may be a risk of headphone/earphone and hearing damage from high volumes, so set the gain level before use.

    *When two or more earphones/headphones are connected to the output terminal, sound is outputted to the earphone/headphone connected last.


    Quad-DAC with high output and noise-free sound

    The ACRO CA1000 is equipped with four ES9068AS DACs, providing perfect decoding capabilities with Astell&Kern's amplifier circuit technology.

    The clear and overwhelming output expresses the original sound without distortion.

    2.5mm, 3.5mm, 4.4mm and 6.35mm output circuits are physically separated by applying tiny, independent relay components.

    If the signal from each output stage of a high-power headphone amplifier is not blocked properly, this can cause noise interference.

    ACRO CA1000 boasts a noise-free output with an independent circuit structure by using relays to completely block connectors that are not in use.


    32bit/384kHz, Native DSD512 Support

    ACRO CA1000 features premium sound using Astell&Kern’s proven technology.

    You can enjoy your favorite music to your heart's content with support for native DSD512 and 32bit/384kHz PCM playback.

    Bit-to-bit playback is possible up to 32-bit/384kHz PCM and 22.4MHz native DSD, so even the smallest details the artist wanted to express in the music can be heard without distortion.


    Premium Sound Anywhere

    ACRO CA1000 features powerful output with various input and output options that can only be found in a stationary headphone amplifier.

    A portable amplifier that can operate without an external power source adds utility beyond existing products.

    A headphone amp should be able to deliver perfectly noise-free sound for an extended period of time.

    The ACRO CA1000 is equipped with an 8,400mAh large-capacity battery to provide clear, distortion-free premium sound without the need for a separate power connection.

    In order to solve the problem of relatively reduced playback time due to the small size and powerful output, all power-related parts were examined and the power circuit was redesigned several times. The result is continuous playback for more than 10 hours.

    With the Astell&Kern ACRO CA1000’s excellent sound reproduction ability, you can hear the full, original sound of your music anywhere.

    * MUSIC: FLAC, 16bit, 44.1kHz, Unbalanced, Vol.40, LCD Off, Low Gain

    * Playback time may vary depending on user environment.


    Faster charging with USB-PD 2.0 support

    The ACRO CA1000 features USB-PD 2.0 charging that supports 9V/3A for faster charging.

    When used with a USB-C adapter that supports USB-PD 2.0 fast charging, the ACRO CA1000 can charge to 50% in one hour,

    and fully charge in about 2 hours and 30 minutes.

    * Charging times measured using a 9V, 3A adapter while the CA1000 is powered off.


    Speaker effect when listening through headphones
    - Crossfeed

    In a headphone environment in which the left and right channels are clearly separated, ear fatigue may increase during prolonged listening.

    The moment you turn on Crossfeed, the experience of crisp, but comfortable sound begins.

    Crossfeed mixes parts of the original signal from one channel and sends that signal to the opposite channel with a time difference to center the sound image.

    Through the use of detailed settings such as Shelf Cutoff, Shelf Gain, and Mixer Level, you can set the level of crossfeed according to your listening preferences.


    Equipped with Bluetooth 5.0 and Support
    for Wireless 24-bit aptX-HD, LDAC Codecs

    The latest Bluetooth version provides high sound quality with the convenience of wireless playback to headphones and IEMs.

    Bluetooth 5.0 features faster transmission speed, greater range and a more stable wireless connection when compared to Bluetooth 4.2.

    Both LDAC and aptX HD is supported to provide audiophiles with the best wireless sound possible.


    Wireless Hi-Fi Sound Through BT Sink

    The newly introduced BT Sink function connects the CA1000 to an external device via Bluetooth, similar to connecting a smartphone with a BT speaker.

    Music from an external device, such as a smartphone can now be played back in high-quality on the CA1000 using the BT Sink function.


    ReplayGain Automatically and Uniformly Adjusts Playback Volume

    ReplayGain, which adjusts sound sources with different volumes to an identical level, has been applied. Now, enjoy your own playlists seamlessly through the ReplayGain feature on CA1000.

    - ReplayGain supports up to 24bit/192 kHz sound sources.


    Silver Plating Shield Can

    Astell&Kern products apply shield cans so that noise and elec-tromagnetic interference, which occur when the countless parts are in operation, do not affect the audio block.

    The CA1000 has taken it a step further by applying highly con-ductive, hyper-pure silver plating on the existing shield cans for perfect shielding that provides excellent audio performance.


    AK File Drop to enjoy wireless transfers

    The new AK File Drop function in the CA1000 makes files transfers easier and more convenient.

    Using AK File Drop, you can freely transfer files wirelessly through a PC, smartphone, or FTP program located on the same network.

    Music file management is now possible with a cableless, wireless solution.


    General Specifications

    Model: ACRO CA1000

    Body Colour: Moon Silver

    Body Material: Aluminum

    Display: 4.1 inch 720 x 1280 touch screen

    Supported Audio Formats: WAV, FLAC, WMA, MP3, OGG, APE, AAC, ALAC, AIFF, DFF, DSF, MQA

    Sample Rate: PCM : 8kHz ~ 384kHz (8/16/24/32bits per Sample) / DSD Native: DSD64(1bit 2.8MHz), Stereo /

    DSD128(1bit 5.6MHz), Stereo / DSD256(1bit 11.2MHz), DSD512(1bit, 22.4MHz) Stereo

    Output Level (Headphone Out): [Low] Unbalanced 2Vrms / Balanced 4Vrms (Condition No Load),

    [Mid] Unbalanced 4Vrms / Balanced 8Vrms (Condition No Load),

    [High] Unbalanced 6Vrms / Balanced 12Vrms (Condition No Load),

    [Super] Unbalanced 8Vrms / Balanced 15Vrms (Condition No Load)

    Output Level (RCA Out): 2Vrms (Condition No Load)

    CPU: Quad-core

    DAC: ESS ES9068AS x4 (Quad-DAC)

    Decoding: Support up to 32bit / 384kHz Bit-to-Bit playback

    Headphone Outputs: Unbalanced (3.5mm, 6.35mm) / Balanced (2.5mm, 4.4mm)

    Analog Inputs Outputs: RCA (Stereo pair) x1, RCA (Stereo pair) x1

    Digital Inputs Outputs: Coaxial x1, Optical x1, USB(Type-C) x1, Optical(3.5mm) x1, USB(Type-C) x1

    Wi-Fi: 802.11 a/b/g/n/ac (2.4/5GHz)

    Bluetooth: V5.0 (A2DP, AVRCP, Qualcomm® aptX™ HD, LDAC)

    Dimensions: 4.12"(104.9mm)[W] x 1.77"(45mm)[H] x 5.85"(148.8mm)[D]

    Weight: about 32.41oz (919g)

    Feature Enhancements: Firmware upgrade supported (OTA)

    Operating Temperature: 0℃ ~ + 40℃ (32℉~ 104℉)

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