Bakoon Products SCL CAP-1007 Small Preamplifier

Bakun Products has created the CAP series, which produces a high-quality music life in a size that fits perfectly in a narrow space. In order to play all the music information even at low volume in a studio room that the neighbors are concerned about, Bakun Products' proud SATRI circuit technology is generously introduced. The CAP-1007 is an amplifier that selects and adjusts the volume of many audio signals for TVs, CD players, DVD players, tuners, mobile players, smartphones, etc. This is an indispensable amplifier for those who have many sources they want to listen to on their audio equipment and are too lazy to change the wiring each time.

Non-feedback line control

The output uses a powerful buffer amplifier, HBFBC, to minimize sound degradation. Relays with a machine life of more than 100 million cycles are used for signal selection. The frequency response is also guaranteed up to the MHz band, so there is no signal degradation. If the distortion rate changes due to a change in frequency, you will feel coloring and feel a habit in the sound, but with the CAP-1007, there is almost no change in distortion from 20Hz to 50KHz. This shows how the CAP-1007 has an honest sound without coloring.

Extensive input system

It is equipped with 6 inputs and switches the input signal with the INPUT SELECTOR. INPUT1 to 4 are RCA terminals on the back, and INPUT5 and 6 are phone jacks on the front and rear panels, respectively. The phone jack on the front panel is convenient for connecting the signal of a mobile device such as a smartphone.

If the gain of the power amplifier is maximized, the volume of the speaker can be controlled by the preamplifier. If you have a CD player or DVD player and this unit at hand, you can conveniently switch music sources and control the volume at hand.

Powered by a mobile battery and noiseless

Use the included USB cable for DC5V INPUT. You can use a USB charger or a mobile battery as a power source. The serious current consumption is 5V250mA, so a 10AH battery can be used for 40 hours. If you use a mobile battery, it will not be affected by noise, so you can operate the CAP-1007 in the best condition.

To the New Face

It has become a new face. In order to keep the price down, the CAP series uses commercially available general-purpose products for the exterior, but this time we are trying to improve the unity and texture of Bakun Products by integrating the knobs with high-grade products.

Maximum Output	8V (1% distortion)
Distortion rate (1KHz)	4V:0.03%
SNR	-120db(GAIN 0db)
Frequency response	20Hz~400KHz
Phase characteristics	0°(20KHz),45°(400KHz)
size	W130 x H45x D180mm
weight	470g
power	5V250mA DC

*Bakun Products will gradually change its logo and name to SCL (SATRI Circuit Laboratory). Thank you for your understanding.


Despite the fact that there are 6 inputs in a body size of less than 20 cm, it is well put together. It's ultra-lightweight at 470g, but it's comfortable to operate because of the solid rubber grip underfoot. Even with the power amplifier CAP1001, it's a little big Tupperware, so it's a luxury to worry about with more options for installation locations ...
Except for the turntable, you can enjoy music just by connecting it directly to the power amplifier, but I think that the sound is better via the CAP-1007, probably because there is no deterioration or distortion of the sound due to the use of a buffer amplifier such as HBFBC. It may also be a big factor that the use of batteries is free from power supply noise. Even though they don't use particularly big speakers, they don't have any strange habits, and they give you a clear and transparent sound that is unmistakable in the Bakun Products lineage.
I listened to the battery-powered CAP-1007 preamplifier on its own, and I was impressed by the high S/N that surpasses the ultra-high-class preamp and the fresh sound quality. It has a natural texture that does not feel colored at all, has a wide dynamic range and frequency range, and has a clear, clear, and realistic sound from large signals to weak signals. Since the power amplifier CAP-1001 has a low input impedance of about 10 KΩ, it is often not possible to demonstrate its true potential due to insufficient drive capacity when using a sound source device that uses an operational amplifier IC as the output circuit. However, when the CAP-1007, which has a high input impedance and high drive capacity, intervenes, the sound quality changes completely, and the sound is instantaneous and stretched, and the sound is clear and vivid. For the speakers, I used an 8Ω KEFQ950 with an efficiency of 91dB/W/1m, but because of the soft distortion characteristics, the volume was unbelievable for a 6W/ch amplifier. The CAP series is a tour de force that demonstrates that it is possible to achieve high sound quality even with a small, lightweight, and low-cost amplifier.
* MJ Radio and Experiment