ToneWinner MS-02A 5.1.2 Home Theater AV Receiver

First of all, the core component of the product-Dolby panoramic sound (Dolby Atmos) power amplifier to make a detailed understanding: all aluminum alloy chassis, color LCD screen, and another panoramic sound “Yueheng No. 1” is almost the same. The only difference is that Yuehuan No. 1 is connected to the speaker by a 24-pin All-channels cable, while the MS-02 kit uses split panoramic sound: left / right (R) channel, middle speaker channel, left / right surround channel / left and right top channel and bass channel output terminal.

The rest, such as four-in-one-out HDMI port with ARC function, analog audio input port, digital optical fiber and digital coaxial input port, Bluetooth input port, USB data input port and USB disk input port, etc., there is not much difference!

Open the top cover of the power amplifier, you can clearly see the internal structure and circuit layout of MS-02: the printed circuit board on the left side of the chassis, which occupies most of the area of the box, is the main circuit board that integrates large-scale DSP sound field processing and Dolby panoramic sound (Dolby Atmos) decoding, as well as multi-channel class D power amplifier and output circuit. The position on the right side of the box is the multi-channel digital power supply part of this amplifier, which is the power source of the machine!

From the main circuit board of the power amplifier, we can clearly see two large-scale integrated chips with a large area symmetrically installed, one is the DSP21487, of Analog Devices (American Analog Devices) and the other is DSP 21489, which is one of the certification schemes of Dolby panoramic sound Dolby Atmos DSP sound field processing technology in the United States!

The decoder uses Analog Devices (American Analog Devices) the most mainstream fourth-generation SHARK floating-point DSP21487 and 21489 and other large-scale integrated chips to complete Dolby Atmos panoramic audio decoding OK! in fact, the chip can smoothly complete Dolby Atoms 5.1.2 system and Dolby TrueHD, Dolby Digital+,dts HD dts and other traditional audio stream decoding.

The follow-up circuit uses the industry elite leader-American CIRRUS LOGIC (American Crystal Semiconductor) mainstream DSP sound field processing chip CS48560 to complete sound effects such as sound field virtual and sound field expansion, and is responsible for adjusting the sound effect of the entire system and effectively correcting the sound frequency response curve of each loudspeaker, so that it can better achieve and complete the acoustic sound effect standards required by Dolby Atmos panoramic sound technology.

Among them, the author noticed that the large-scale integrated chip with the largest area and the largest number of feet located behind the circuit board is the si19777cluc HDMI/MHL2.0/3.0 video / audio distribution processor produced by Ledys Semiconductor from Oregon in the United States, which supports up to 32 channel object audio, 4K/30 and 1080Pmax 60. the chip is large, good heat dissipation, full sense of science and technology, and strong visual impact. Is one of the indispensable and important members of high-definition audio and video products

The power amplifier circuit of this machine adopts class D digital power amplifier. Class D power amplifier has many advantages, first of all, it has a very high energy conversion rate, and its volume is very small, calorific value is small, basically does not need a large radiator. And it has high reliability and stability, energy saving and environmental protection. Sound quality and timbre have also made great progress in the continuous evolution and improvement. With the high-power digital power board on the left side of the amplifier, the MS-02 amplifier can be fully guaranteed to have an adequate power output of 7X30W (8 Ω) + 100W (2 Ω subwoofer)!