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Accuphase Analog Input Board AD-50 and Digital Input Board DAC-50

Accuphase Analog Input Board AD-50 and Digital Input Board DAC-50


 Analog Disc Input Board / AD-50

The AD-50 is a high-performance phono equalizer amp board dutiable for use in various Accuphase preamps or integrated amplifiers. It features the latest circuit topology and carefully selected high-quality materials for ultra low noise and extremely precise RIAA equalization with minimum deviation. This brings out the sonic character of every phono cartridge, letting the listener fully enjoy the enchanting musical qualities of analog records. MC/MM switching can be performed with the controls on the front panel of the amplifier. For MC, the impedance most suitable for the cartridge in use can be selected (30/100/300 ohms). The board also incorporates a subsonic filter to cut ultra low frequency noise and woofer flutter caused by record warps which could otherwise affect reproduction quality in the audible spectrum.

Specifications & Features

  • Ultra Low Noise ~ 12% lower at MC, 7% lower at MM settings -> Close to C-37
  • Wide backward Compatibility

 

Digital Input Board with USB / DAC-50

The DAC-50 is an optional digital input board that supports a broad range of digital sound sources and is equipped with a high-precision MDS type D/A converter for optimal sound quality. The converter uses AK4490EQ chips from Asahi Kasei Microdevices in a double parallel configuration per channel. Installing the board in a slot on the rear panel of a supported Accuphase component provides direct input capability for signals from digital components for high-grade playback. Three types of inputs are provided: USB (Type B), OPTICAL (for optical fiber cable), and COAXIAL (for coaxial cable). The USB input handles signals up to 11.2 MHz / 1-bit (DSD) and 384 kHz / 32-bit (PCM), the coaxial input supports up to 192 kHz / 24-bit and the optical input up to 96 kHz / 24-bit.

Specifications & Features

  • New Digital Capability at USB connection ~ up to 384kHz/32 bit PCM, 11.2896MHz-DSD(Dop and Asio 2.1)
  • Great THD+Noise characteristics
  • Premium AK4490EQ is installed
  • ANCC(Accuphase Noise and distortion Canceling Circuit) is applied
  • Wide backward Compatibility