From Bakoon Products, the CAP series was born to produce high-quality music life with just-fit size in a narrow space.
CAP-1003 is a headphone amplifier of the very small size of 75(W) x30(H) x100(D) mm only 180g.As I am designed to get a high-quality tone by pure A-class operation in an output stage, I can enjoy not only music but also the sound of the movie fully.

Bakoon Products changed its logo and name to SCL (SATRI Circuit Laboratory).

The CAP-1003 is a non-feedback amplifier, so it has a wide range of frequency characteristics and excellent transient characteristics.It inputs the output of the headphone terminals of smartphones, tablets, and mobile music players, reduces distortion by reducing the load on the headphone output of the player, and drives the headphones with a powerful output circuit equipped with the newly developed IC "HBFBC".

Like other CAP series, the power supply can be supplied from +5V, USB or mobile battery.
Because the mobile battery has a thing of large capacity such as 10000mAh, I can operate it enough even if I do not squeeze the operating current so much. Internally, it realizes stable operation as ±5V.The input has two RCA and mini・phone jacks, and can be selected by the front input switching switch.

The noise is 0.0011 MV and the signal-to-noise ratio is -119.2db.
The noise characteristics of the output circuit combined with HBFBC are excellent, and there is no turbidity in the reproduced sound even at low volume.
In addition, since the headphones are strongly driven with low impedance, the synergistic effect with low noise allows you to hear fine sounds clearly.
The frequency of -3db is 3.28MHz. At 100kHz, both phase and frequency characteristics are flat.Since the frequency characteristic is wide band, the reproduction of square wave is also beautiful.

The first impression is very small.The CAP-1003 headphone amplifier is among the smallest of the new small CAP series.It is nice that there are 2 systems of RCA and earphone input on the body that is small enough to fit completely in the palm.The sound is also good.Because it is a bakoon, i do not pull out my hand.It was as if the air that had been hazy until just now was clear and the view became better, so it seemed that you could see the scenery in the distance clearly.The dynamic vocals in the live video on YouTube have a firm tone in the voice, and a high tone with stretch goes through the live venue.The atmosphere of the stadium, which can accommodate tens of thousands of people, is filled with a sense of realism.The separation of sound is good, the instruments, the vocals, and the enthusiasm of the crowd are not fused, and it is not noisy.This would make the movie quite enjoyable too.It is excellent that you can use a portable battery with a USB connection.I can take it out of the world without worrying about it.It is also a farewell to the power supply noise.