The panel design is also simple and simple. In addition to the volume adjustment, source selection switch, power switch and Tape 2 Monitor switch, all function keys are designed under the sub-panel. For more practical operation, it is more convenient to rely on the remote control, and the remote control also has the design of the front and secondary panels. The complex and rarely used function keys are designed under the secondary panel. The control keys are spaced in different shapes, making it easy for users to get started. ; Also has a learning function, can control other AV equipment. In addition, the button has a night light display. It is also very convenient to use in the dark, YAMAHA's design is really a lot of thought.
The backplane output / large terminals are roughly the same as the DSP-A3090. There are 5 groups of pure audio input terminals, 2 groups of pure audio output terminals, 5 groups of AV input terminals (including s terminals), 3 groups of AV output terminals (including s terminals), which can connect 4 sets of pure Audio equipment and 5 groups of AV equipment. The special feature is also a group of 5.1 channel input. If there is any new surround system in the future, users do not need to change the machine, just buy a decoder. In terms of digital terminals, there are 1 set of Dolby AC-3 RF input, 3 sets of coaxial input, and 5 sets of Toslink fiber input. 1 set of Toslink optical fiber output, and each set of input can automatically recognize the signal of PCM, Dolby AC-3 or DTS, each channel has a pre-level output terminal, can be connected to a more advanced power amplifier upgrade, all terminals are Gold plated to prevent oxidation. The circuit of DSP-Al can be said to be made by combining the latest technology.
The Dolby AC-3 decoding part uses the YSS249 chip developed by YAMAHA itself. This chip uses 24-bit operation and has a very high precision. The transmission rate of information reaches 640Kbps. The DSP sound field and various EQ functions are also completed by YAMAHA's own YSS2l4 DSP chip. This chip also uses 24-bit operation. At the beginning, YSS214 was used in professional equipment such as audio sources and communications. The DTS part uses an independent circuit board, which is set on the digital circuit. The outer cover is shielded by a thin metal plate. In addition to isolating noise, it also has the effect of enhancing heat dissipation. DTS decoding uses the DSP56009 chip produced by Motorol, which uses 24-bit operation and the operation speed is up to 93Mhz. The A / D conversion IC is Asahi Kasei's latest product AK5391, sampling at 24-bit l28 times, with a dynamic range of 113dB and an SN of 113dB; D / A conversion IC is also the latest product of Asahi Seiki AK4324. This IC is equipped with a 24-bit 8-fold sampling filter, which can correspond to a 24-bit 96KHz signal, with a dynamic range of 1O5dB. Since this DAC is a stereo design, a total of 4 are used in this unit.
In addition, the power supply part of this machine is worth mentioning: an EI transformer with a low magnetic leakage of 8.5kg covered copper foil and two Nichicon Gold Tune large filter capacitors, with a total value of up to 54000uF, can lay a solid power supply for this machine Foundation. The original factory claims that the output power of the main, middle and surround channels is 110W (6 ohms) per channel, and the front surround channel is 35W (6 ohms).
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