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    Audio-OPUS #1 High Resolution Portable Audio Player - Review


    Korean tech company 'thebit' (The Best Internet Technology) has started high in its naming of the OPUS#1 player, making us think of sublime classical compositions and other arty treats; but does the OPUS#1 hit the right notes?

    Design and appearance

    The OPUS#1 has a slightly angular and bevelled look which is reminiscent of Astell&Kern's recent efforts, but with a slightly softened feel in comparison. It's a pattern which is reflected in the sound of the player when compared to A&K but more on that later. The touchscreen is very responsive and easy to operate, with a good choice of navigation methods available with the player software. We can navigate by song, album, artist, genre, favorites and also by folder, which should keep everyone happy.

    With a firmware update (1.10.15 at this time) the player remembers the track which was last listened to, if the track was paused and the player allowed to enter 'hibernation mode'. Upon reawakening the player, the music resumes from where it was paused.

    The OPUS 1 case is made using enhanced ABS and tempered glass, similar to many of the newer Smartphone’s on the market, the tempered glass covers almost all of the front and back of the player, giving the player OPUS#1 a premium feel, while the ABS shell reduces the overall weight of the player.


    Key Features

    Slots for two MicroSD cards (currently up to a capacity of 200Gb each) together with the on-board storage of 32Gb make the Opus#1 a heavyweight in terms of capacity, and the clear screen and intuitive navigation make it a breeze to find what we wish to listen to.

    The sound can be moulded to the tastes of the user by way of the EQ feature in the player; there are three user EQ settings which can be stored, there is a delay of 3 or 4 seconds between selecting EQ settings and hearing any changes come through in the sound, why I am not sure, but in a strange way it gives you a chance to here how the EQ has changed the sound, but it is an unusual delay that may frustrate you for a few seconds.

    The Opus#1 can handle all popular formats up to 24bit/192KHz and also DSD so we can take advantage of all that storage capacity with high quality files! Also the optical output can feed audio data to an external DAC for use with a full-size hi-fi system or a dedicated headphone amp, although the Opus#1 does sound pretty spectacular already.


    Durability & build quality

    The case as mentioned made of high quality tough ABS  and the player certainly feels substantial and solid, but without feeling too heavy or bulky. That is partly due to the front and back being tempered glass (the front being the touchscreen, obviously!).

    Buttons are present on the sides and are easy to operate with a good feel; they also function when the screen is inactive but shouldn't cause any trouble with the player being used whilst in a pocket or bag. Use of the leather case reduces any chance of unwanted button presses, but it is rather tight,and once on, hard to get off again!

    Sound Quality

    Some players have an ultra-accurate sound with which there is a danger of getting too cold and clinical, and others give an overly warm sound which can be further accentuated by choice of headphones. The Opus#1 does very well at occupying the middle ground, giving a very clear presentation which is also very musical. Most headphones an earphones will likely respond well to this, making the Opus#1 a good choice for those who already own decent quality headphones and seek to get the best from them.


    Good solid build,
    Sound quality clear and well balanced,
    Good amount of power for portable headphones,
    Full navigation options,
    Leather case is a nice extra but hard to remove


    EQ effect is delayed


    For a first attempt, the Opus#1 is an amazing effort and promises to be very competitive amongst offerings of much more established companies like Astell and Kern. There's more to come from makers 'thebit' and we are looking forward to future products too!


    OPUS#1 specifications.

    24bit / 192kHz High Resolution Sound

    32bit processor core

    Cirrus Logic CS4398 x 2EA Dual DAC

    ARM Cortex-A9 1.4GHz, Quad-Core CPU DDR3 1GB

    SNR 115dB, THD+N 0.0007%, Crosstalk – 130dB, Output 2Vmrs

    Low-clock-jitter sensitivity: 50ps(Typ)

    4inch TFT Wide Touch Display (480 x 800)


    MP3, OGG, APE(Normal, High, Fast)

    Internal Memory 32GB

    External Micro SD Card Memory 200GB x 2EA

    Enhanced ABS Solid Body and Tempered Glass

    Audio Performance

    CS4398 * 2EA(Dual DAC)

    Support up to 24bit / 192KHz Bit to Bit Decoding

    Frequency Response
    ±0.02dB(Condition: 20Hz~20KHz) Unbalanced & Balanced
    ±0.3dB(Condition: 10Hz~70KHz) Unbalanced & Balanced

    Signal to Noise Ratio
    114dB @ 1KHz, Unbalanced
    115dB @ 1KHz, Balanced

    130dB @ 1KHz,Unbalanced / 135dB @ 1KHz, Balanced

    0.0007% @ 1KHz

    Output Impedance
    Balanced out 2.5mm(1ohm) / PHONES 3.5mm(2ohm)

    Ouput Level
    Unbalanced 2.1Vrms / Balanced 2.3Vrms(Condition No Load)




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