Do you have a question about the ZD3 and is the answer not in the manual?
Questions and answers
Jeff Lynn
June 3, 2025
Got ZD3 and dual ZA3 amps, ZD3 volume no controlling ZA3s. Suggestions? Also volume on ZA3s at three quarter and not super loud with 48v power supplies.
Introduction Thank you for purchasing the ZD3 Balanced Stereo DAC. The ZD3 is a HiFi-grade balanced stereo DAC meticulously developed by Fosi Audio after thoroughly understanding user needs. It features an ESS flagship high-precision audio DAC chip, delivering clear and immersive sound quality.
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Introduction Bypass Switch OLED Display Main Volume Knob/Power Switch/Input Mode Selector XLR Right Channel Output (US standard) XLR Left Channel Output (US standard) RCA Right Channel Output RCA Left Channel Output 12V Trigger In (3.5mm Port) 12V Trigger Out (3.5mm Port) Coaxial Input HDMI (ARC) Input Optical Input...
Package Contents USB-A to USB-B Cable Bluetooth Antenna 12V Power Adapter ZD3 User Manual 12V Trigger Cable Infrared Remote User Manual...
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Power On/Off Operations 1. Short press the main volume knob of the ZD3 to power it on. The screen will display "Fosi Audio" for 2 seconds, then enter the main menu; 2. When the ZD3 is on, press and hold the main volume knob for 2 seconds to turn it off.
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Bypass Mode 1. When Bypass mode is activated, the ZD3 enters a pure DAC mode where the output voltage is fixed, and volume adjustments cannot be made. Volume control must be done through connected downstream devices (such as preamplifiers or active speakers);...
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Connecting Input/Output Sources 1. Connect to a power amplifier or a pair of active speakers; 2. Use RCA or XLR cables to connect to the power amplifier or active speakers. Ensure that the amplifier or active speakers are turned off before connecting to prevent damage to the equipment;...
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Optical Input Mode 1. Connect one end of the optical cable to the ZD3 and the other end to the output device; 2. Short press the main volume knob to switch to optical input mode, or press the “OPT”...
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HDMI (ARC) Input Mode 1. Connect one end of the HDMI cable to the ZD3 and the other end to the output device; 2. Short press the main volume knob to switch to HDMI input mode, or press the “HDMI”...
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USB Input Mode 1. Connect one end of the included USB cable to the ZD3 and the other end to the output device; 2. Short press the main volume knob to switch to USB input mode, or press the “USB” button on the remote control. The name of this mode will appear in the top right corner of the screen.
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ZD3. Merak Passive Speaker Trigger Out The ZD3 can control the power on/standby mode of the downstream device connected to Trigger Out. Turning Off the Display You can turn off the display by lightly pressing the "Display" button on the included remote control.
Frequently Asked Questions 1. The system is set up, but there is no sound? A. No power – check if the display on the ZD3 front panel is lit. B. Volume too low – rotate the volume knob clockwise to increase the volume to an appropriate level.
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Warranty and Maintenanc Fosi Audio pledges to give a 24-month limited warranty and support from the date of purchase. If you encounter any problem when using our product, please contact our support team at support@fosiaudio.com. About Us Fosi Audio designs and builds innovative audio products with all your music in mind.
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Do you have a question about the ZD3 and is the answer not in the manual?
Questions and answers
Got ZD3 and dual ZA3 amps, ZD3 volume no controlling ZA3s. Suggestions? Also volume on ZA3s at three quarter and not super loud with 48v power supplies.