AIYIMADAC-A5pro Headphone Amplifier Audio DAC Decoder Optical/Coaxial/USB Digital to Analog Converter 24Bit/192kHz CM6642+ESS9018K2M+OPA2134 NE5532+TPA6120

Built well and sounds great. The volume knob needs to be rotated too far though. I don't know how many full revolutions are required to go from minimum to maxium volume but it is too many.

I have an older laptop on which I play music. The amplifier I use is older, too - a NAD 3020. Up until now, the only way to connect them to each other was by running a cable from the laptop earphone jack to the RCA inputs of the amp.I purchased this Aiyima DAC A5 PRO in order to solve the following problems :- Running a cable with an analog signal from the laptop was introducing some noise and interference.- I had low confidence in the earphone jack circuitry.- The built-in DAC on the laptop was older and I suspected it was degrading the music.With the new Aiyima, I simply ran the supplied USB cable from a port (USB 2) on the laptop to the USB input on the Aiyima and I was good to go. The laptop automatically recognized the Aiyima as a digital audio device, and bypassed the laptop’s internal DAC.The sound is definitely better. I wish I had done this sooner. It was so easy. I also wish there was equipment like this available when I was in college, when we all spent inordinate amounts of money on low quality audio components. Thank you, Aiyima!

好きな音でしたので満足しています。入力がUSBの場合、44.1khzの2,4倍が再生できるので、ソフトウェアでアップサンプリングした音源を再生できるのが良い。「私の環境だと蟹さんで88.2Khzや176.4Khzを出力できない。」購入後困ったことがありました。foobar2000で蟹さんだと問題なく再生できるハイレゾ音源が、この機器にUSB入力して出力すると音が壊れ、S/PDIF入力して出力すると正常に再生できるという症状がありました。foobar2000の拡張設定のバッファ値を小さくすると正常に再生できる様になりました。

Do not yet know how good this product is, since the instructions are in Chinese.Wondrous!

Solid build.Pairs well with Aiyima A07 amp.Mute function (push in Volume Knob to toggle on/off.)