Bakoon Products SCL CAP-1003 Small Headphone Amplifier

Bakun Products has created the CAP series, which produces a high-quality music life in a size that fits perfectly in a narrow space.
The CAP-1003 is a miniature headphone amplifier measuring only 180g at 75(W)x30(H)x100(D)mm. The output stage is designed to obtain high-quality sound with pure A-class operation, so you can fully enjoy not only music but also movie sound.

Bakun Products will gradually change its logo and name to SCL (SATRI Circuit Laboratory).

Since the CAP-1003 is a non-feedback amplifier, it has a wide frequency response and excellent transient characteristics. The headphone jack output of a smartphone, tablet, or mobile music player is input, and the load on the player's headphone output is reduced to reduce distortion, and the signal is driven by a powerful output circuit equipped with the newly developed IC "HBFBC".

Like other CAP series, the power supply is +5V, and can be supplied from USB or a mobile battery.
Since the mobile battery has a large capacity such as 10000mAH, it can be operated sufficiently without squeezing the operating current too much. Stable operation is achieved as ±5V internally. There are two inputs, RCA and mini phone jack, which can be selected with the input selector switch on the front.

The noise is 0.0011 mV and the signal-to-noise ratio is -119.2 db.
The noise characteristics of the output circuit combined with HBFBC are excellent, and the playback sound does not become muddy even at low volumes.
In addition, since the headphones are strongly driven with low impedance, detailed sounds can be heard clearly due to the synergistic effect with low noise.
The frequency of -3db is 3.28 MHz. At 100 kHz, both the phase and frequency response are flat. Since the frequency response is wideband, the reproduction of square waves is also beautiful.

First impressions are very small. Originally, many of Bakun's products were compact except for high-end products, but this headphone amplifier CAP-1003 is by far the smallest of the new compact CAP series. I'm glad that there are two inputs, RCA and earbud input, in a body that is small enough to fit comfortably in the palm. The sound is good again. Because it's a bakun, I don't cut corners. It's as if the hazy air has cleared up and the visibility has improved, so I can see the distant scenery clearly. The vocals that move in the live video on YouTube have a firm voice and a stretched high note that penetrates the live venue. The enthusiasm of the stadium, which has a capacity of tens of thousands of people, is fully transmitted. The separation of sounds is good, the instruments and vocals and the enthusiasm of the audience don't blend together, and it's not noisy. This will also make the movie quite enjoyable. It is excellent that a portable battery can be used with a USB connection. With this, you can take them out all over the world without worrying. Say goodbye to power supply noise.