Supported Sampling Frequencies【DSD】11.2 MHz / 1-bit【PCM】384 kHz / 32-bit

Digital Input Board With USB, Optical, and Coaxial Inputs

Convert signals from various digital sourcecomponents into high-quality analog signals

The DAC-50 is an optional digital input board that supports a broad rangeof 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 perchannel. Installing the board in a slot on the rear panel of a supported
Accuphase component provides direct input capability for signals fromdigital components for high-grade playback. Three types of inputs areprovided: 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.

DAC-50 connection example
Coaxial digital cable【PCM】32 kHz to 192 kHz / 24-bit

Digital (S/PDIF) outputDigitalcomponent

Optical fiber cable【PCM】32 kHz to 96 kHz / 24-bit

USB cable

DAC-50【DSD】2.8224 MHz, 5.6448 MHz,11.2896 MHz / 1-bit (11.2896 MHz: ASIO only)PC【PCM】32 kHz to 384 kHz / 32-bit＊ For playback of material on a computer via the USB port, it isnecessary to install software from the supplied USB Utility 2
CD-ROM. (Not required with an Apple Macintosh computer.)

Input selection method
C -2120, E-650, E-600, E-470, E-370, E-270
When the DAC input selector button or DAC input selector switch on therespective component is used to select the DAC-50 signal, the sampling
frequency of the locked signal is shown on the display.
DAC input selector
button and LED
indicators
Sampling frequency display example

Other models

Input selector

If multiple digital input signals are supplied at the sametime, and OPTION is selected with the input selector, theunit automatically locks onto a signal using the following
priority sequence: COAXIAL
OPTICALUSB .
● To exclude a signal from being selected, either disconnect
the cable from the component that is not needed forplayback, or turn the power switch of that component off.
●DAC-50AD-50

Installation example DAC-50 installed in option board slot on rear panel

Specifications■ "2MDS" type D/A converter● USBFormat:
USB 2.0 Hi-Speed (480 Mbps) compliant
Sampling frequencies: 2.8224 MHz, 5.6448 MHz, 11.2896 MHz(1-bit 2-channel DSD) (11.2896 MHz: ASIO only)
32 kHz – 384 kHz(16 – 32-bit 2-channel PCM respectively)
Suitable cable:
USB 2.0 cable with Type B connector(max. 2 m)
JEITA CP-1212 compliant● OPTICAL Format:
Sampling frequencies: 32 kHz – 96 kHz(16 – 24-bit 2-channel PCM respectively)
Suitable cable:
JEITA standard optical fiber cable
IEC 60958 AES-3 compliant● COAXIAL Format:
Sampling frequencies: 32 kHz – 192 kHz(16 – 24-bit 2-channel PCM respectively)
Suitable cable:
75-ohm coaxial digital cable

Supplied accessory● USB Utility 2 CD-ROM※Specifications and design are subject to change without notice for improvements.

● About sampling frequency display when DAC-50 is installedin C-2120, E-600, E-470, E-370, or E-270

Sampling frequencies up to 192 kHz are shown as is.
Signals with the following sampling frequencies are handled without problem,but the indication is always "192.0 kHz":【DSD】2.8224 MHz, 5.6448 MHz, 11.2896 MHz【PCM】352.8 kHz – 384 kHz■ Supported models● Preamplifiers

C-2000, C-2110, C-2120, C-245 (※), CX-260 (※)● Integrated amplifiers

E-213, E-250, E-260, E-270, E-307 (※), E-308 (※), E-350, E-360, E-370,E-408, E-450, E-460, E-470, E-530, E-550, E-560, E-600, E-650

Input selection, sampling frequency display and other specifications differ
depending on the model.
(※: Installing two DAC-XX boards is not supported.)＊ The capability for playback of music data via USB depends on the operating system
and music playback software of the computer.
＊ For information on settings for USB and connection methods, please refer to thecomputer documentation.