SCL AMP-8510A by Bakoon Products – Class A Single-Ended Zero-Feedback Power Amplifier

A high-performance amplifier that offers the ultimate audio experience

The AMP-8510A is an innovative solid-state Class A single-ended zero-feedback amplifier designed to exceed the expectations of music enthusiasts. It is packed with technology and craftsmanship aimed at pushing the limits of sound quality.

Selectable semiconductors for an endless audio experience

With the AMP-8510A, you can choose from the following three types of output semiconductors:

MOS-FET (Metal-Oxide-Semiconductor Field-Effect Transistor)

MOS-FETs are widely used in audio amplifiers due to their very fast, high-efficiency switching. The key advantages of MOS-FETs are their high input impedance and low output impedance. This allows them to deliver large currents while minimizing any deterioration in sound quality.

The three types of semiconductors—Silicon Carbide (SiC) and ultra-low output impedance MOS-FET—each have distinct sound characteristics and perform best for specific music genres. Below, the characteristics, reputation, evaluation, and recommended music genres for each are detailed.

SiC (Silicon Carbide)

SiC devices are known for their fast switching speeds and high efficiency. As a result, they produce highly accurate, clear, and detailed sound. High frequencies are transparent and crisp, midrange is well-defined, and low frequencies are tight with minimal distortion.
SiC semiconductors are highly regarded for their precision and detailed sound quality, commonly used in high-end audio amplifiers. Audiophiles appreciate their ability to faithfully reproduce the subtle nuances of music.
It is ideal for music where fine details are emphasized, such as classical music, jazz, and acoustic performances. It also performs well with compositions that have complex instrument arrangements and a wide dynamic range.

Ultra-Low Output Impedance MOS-FET

The ultra-low output impedance MOS-FET provides extremely low output impedance in the output stage, giving high speaker driving capability and delivering smooth, stable sound quality. It has an overall flat frequency response, with particularly strong and clearly reproduced sound from the bass to midrange.It delivers a warm, smooth sound with natural midrange and rich, deep bass. The low output impedance minimizes signal loss, creating a full and powerful sound. Distortion is minimal,and the sound is very smooth up to high frequencies, making it easy to listen to for long periods.
Compared to traditional MOS-FETs, it offers higher sound clarity and stable sound quality, which is highly appreciated among audiophiles. It is especially favored in amplifiers that balance technical precision with musical warmth. It provides a sound that combines delicate reproduction with smoothness, appealing to audio enthusiasts who seek a relaxed, natural listening experience.
It is ideal for genres that require warm, rich sound, such as blues, soul, and classic rock. It is also suitable for vocal-centered music where natural midrange is important.

Insulated Gate Bipolar Transistor (IGBT))

Its greatest feature is a powerful, rich sound. The structure of IGBTs, which can handle high currents and high voltage, directly contributes to the amplifier's driving power, particularly excelling in the reproduction of mid-to-low range punch and energy. Additionally, the smooth, pleasing sound quality is a major attraction, allowing for rich and musical expression without the hardness often associated with transistor amplifiers. Compared to MOS-FETs, the sound has a solid density, which tends to appeal to listeners who seek analog-like warmth and realism in sound.

On the other hand, in terms of sound characteristics, the tuning often focuses more on the overall smoothness and richness of the music rather than speed or sharpness in the high frequencies. Depending on the genre or listening style, it may sometimes feel a bit gentle. For those who prioritize crispness and fast attack in sound, this approach might seem slightly different, but it also represents the unique character of IGBT amplifiers, contributing to a natural sound flow that is less fatiguing to listen to.

Overall, IGBT amplifiers can be said to be the type that balances power and smoothness, accurately conveying the warmth and texture of music. They work particularly well with genres like classical, jazz, and vocal music, making them ideal for listening styles that seek deep musical immersion.

The four types of semiconductors mentioned above are the culmination of semiconductor technology that plays a crucial role in high-performance audio equipment. These technologies are essential elements in modern high-end audio devices, providing a richer and clearer musical experience. Thanks to the unique characteristics of each semiconductor, listeners can enjoy subtle differences in sound quality and achieve an ideal sound.

Overwhelming Sound Quality and High Precision

The AMP-8510A, with an output of 10W into an 8Ω load, has a distortion of only 0.025% at 1W, and a frequency response ranging from an astonishing 10Hz to 100kHz. Furthermore, it can pass sine waves up to 1MHz, producing a level of detail in music that is breathtaking in its clarity.

Overwhelming Driving Force with Direct-Coupled Design

The most distinctive feature of the AMP-8510A is that the output semiconductor is directly connected to the speaker without any intermediary. This is a design that cannot be achieved with complementary PP (push-pull) configurations. The output is 10W, with a bias current of 1.8A, requiring a higher bias current due to the characteristics of A-class single-ended operation. Thanks to this direct-coupled design:Even with SATRI-LINK connections transmitting current signals, subtle nuances that were previously inaudible are now clearly reproduced. The benefits of the direct-coupled design further highlight the fine details of the music, enabling an unprecedentedly deep auditory experience.

Precise Control with Digital ATT

With a digital ATT (attenuator) using long-life relays, precise gain adjustment in 0.5 dB steps is possible. The attenuation level is displayed numerically, allowing intuitive volume settings and making it easy to achieve the ideal volume balance.

SATRI-LINK for every detail of sound

Equipped with SATRI-LINK for current signal input, connecting it to DACs, phono amps, or preamps from Bakoon Products / SCL allows you to obtain the ultimate amount of information. You can rediscover the depth of the music.

Perfect speaker control and low latency

The speaker control damping factor (DF) is very stable at 72.7, 72.7, and 57.1 for 1W, 5W, and 10W respectively, optimizing speaker control. Additionally, the extremely short delay time of 25 ns (nanoseconds) ensures very fast signal processing, providing high-speed playback.