At the end of 2020, 360 auto network evaluation room has tested the mxr900 12 channel professional DSP audio processor of addzest in Japan. This new cutting-edge digital carrier processor has many design elements, which show us the forward-looking and innovative digital audio processing thinking of addzest R & D team in Japan, and also has unique high-quality audio processing and restoring beautiful sound ingenuity. While developing the mxr900 flagship product, the Japanese addzest team also uses the same technical elements to develop 8-channel professional DSP power amplifier. The protagonist of this issue, asp8100bt, we will have a product together!
R & D of mxr900, Japan addzest is full of innovative ideas and foresight for future voice modification applications. Independent multi-channel optical fiber signal input and output can support all digital signal system. For the future and multi-channel digital audio play, asp8100bt can be said to be for the current mainstream 8-channel play, adding support for balanced signal output, high power stable voltage output.
Heat dissipation of high power aircraft carrier
Japanese product design, from the way of naming, can always let us see some attribute characteristics. Asp8100bt, digital 8 represents support for 8-channel processing, the following digital 100 represents 100W power output per channel, and the last BT is corresponding support for HD Bluetooth transmission. Deep color die casting drawing matte black aluminum frame, the central panel follows the mirror design product logo of Japan addzest series, printed with product signal input application mode for users' reference. The whole processor adopts one side panel design, with hollowed out ventilation and diversion on both sides, and large stepped heat sink on the back side, which shows that the product has high power and high current output design, and has done enough heat dissipation design work.
Mirror logo printed with application details
Persistence of balanced signal input
Whether it is mxr900 pure audio signal processing or digital processing with power output on asp8100bt, Japan addzest adheres to the balanced signal input mode in the same series of two products. RCA terminal supports high-level and low-level input through dedicated line, and can also connect balanced signal and support mixing function. The sampling rate is as high as 96KHz. If optical fiber and coaxial digital signal input are used, the sampling rate is as high as 96KHz Further enhanced to 192Khz, the sound source signal high resolution processing to the extreme.
Single side panel, the power connection part can support line 2 at most to ensure enough stable current and voltage supply. The key to the front-end signal control depends on the control buttons between RCA signal input terminal and horn signal output terminal. The two buttons control 1-6 channels and 7-8 channels independently, press to use low-level signal, pop-up to use high-level signal; the leftmost is the signal output port of 5-8 channels, next to the two groups of digital signal input of optical fiber and coaxial, and the external Bluetooth is also set here.
The large loop coil of internal power supply and the design of low internal resistance filter network can effectively reduce the problem of bottom noise and clutter. The applied capacitance can also make the power supply cleaner. The output is a fever class D amplifier circuit. The high power output plays a great dynamic charm, and the 8 × 100W stable output can also bridge and push the bass according to the demand. Only one of the output circuits of the horn is connected in reverse phase, and the bridge can be completed. The power output is used, the distortion is less than 0.03%, and the output distortion of low level signal is less than 0.01%.
The tuning software continues the design of addzest in this series of products. The interface is intuitive and easy to use. Multiple interfaces or pop-up interfaces are designed to control different parts. For example, after clicking the sound source setting, the pop-up panel can select analog signal, optical fiber coaxial digital signal or Bluetooth. The following is to select different outputs of 8 channels, and can also directly control the phase and gain of 8 channels. After arriving at the main panel, it will change according to the previous sound source setting, so the advantage in actual operation is that you can focus on adjusting the independent 31eq equalization and delay of each channel Time and other details of tuning, reduce the false touch other parts to debug the problem. The filter range is 20Hz-20KHz, and Butterworth, Bessel and Ningke can be selected. The slope is from 6dB / OCT to 48dB / OCT, and can also be turned off. The delay tuning is adjustable from 0ms-14.71ms, and fine to 0.03ms. The power output of asp8100bt meets the requirements of a full active three-way + rear surround or bass system. It can also make a full active four-way fever 4.0 channel. Of course, it also perfectly supports the full active 3.1 channel with bass and so on.
Comments: DSP amplifiers play with multi-channel and small size, while Japan's addzest designs asp8100bt not to be numb but to be small. The key point is to leave enough space for high-power and large current supply and output, followed by high-efficiency Class-D amplification and stable output. It also needs good heat dissipation function, enough space and good dynamics to have excellent sound quality