Douk Audio | Douk Audio Nobsound D5 Stereo 5-Band EQ Preamp Equalizer 1-IN-4-OUT / 4-IN-1-OUT Audio Selector with Retro VU Meter

Features1-IN-4-OUT Flexible Splitter: Easily connect up to four amplifiers or active speakers etc. Choose any combination of outputs to work simultaneously, allowing for effortless comparisons or multi-device listening, offering unmatched flexibility for your home audio setup.4-IN-1-OUT Audio Switcher: Easily switch between four different audio sources such as phones, tablets or players. Say goodbye to constant plugging and unplugging, and quickly compare multiple sources. Ideal for anyone needing seamless switching.5-Band Equalizer with EQ Bypass: Fine-tune your sound with precise frequency adjustments at 80Hz, 330Hz, 1KHz, 3.3KHz, and 10KHz. Or switch to EQ Bypass mode for a direct, unaltered signal to your speakers or headphones, giving you full control over your sound. Retro-Style VU Meter: Features a large analog VU meter with 6-level backlight and gain adjustment, providing real-time visual feedback of the music's dynamics. Housed in a compact metal enclosure, it combines vintage charm with long-lasting durability.  Headphone Amplifier for Personal Listening: The D5 also doubles as a headphone amplifier, offering decent performance for personal listening. Enjoy rich, detailed audio for your headphones, enhancing every note with precision and clarity.  Q: Does the D5 come with a power supply? A: Yes. Please use the supplied DC 5V/2A power adapter for optimal performance. If using other power supply, ensure it provides at least 2A current. Otherwise, the D5 may not function properly.Q: Can all four channels output simultaneously in "1-IN-4-OUT" mode?A: Yes, in "1-IN-4-OUT" mode, all four channels can output simultaneously, with D5 acting as an audio splitter.Q: Can I use D5 as a 4-IN-1-OUT mixer?A: D5 does not support individual volume control for each channel, so it is not recommended as a mixer. However, it works effectively as a switcher.Q: Why is there no sound when the RCA I/O port is connected?A: The 3.5mm Priority jack takes priority over the RCA I/O port. To use the RCA I/O port, please ensure the Priority jack is not connected.  Q: There is noise during operation. What should I do?A: If noticeable noise occurs, please try toggling the GND switch on the rear panel. Switching it on or off can resolve most ground loop issues, but we cannot guarantee 100%.Q: Is volume control available in EQ bypass mode?A: Yes, volume control remains available in EQ bypass mode.ParametersBrand: NobsoundModel: D5Audio input: 3 groups of RCA / 13.5mm AUXAudio output: 3 groups of RCA / 13.5mm JackWorking mode: 1-IN-4-OUT / 4-IN-1-OUT4-Channel simultaneous output: SupportFrequency adjustment: 80Hz/330Hz/1KHz/3.3KHz/10KHzEQ adjustment range: ±10dBEQ bypass mode: SupportInput impedance: 50KΩOutput impedance: 10ΩFrequency response: 20Hz-20KHzMatched headphone impedance: 32-200ΩHeadphone output power: 150mW@32ΩVU meter backlight brightness adjustment: 6 levelsVU meter swing range adjustment: SupportWorking voltage: DC 5V/≥2ADimensions (WDH):  13080104mm / 5.123.154.09inPackage dimensions (WDH): 210185100mm / 8.277.283.94inNet weight: 685g / 1.51lbPackage weight: 1.0kg / 2.20lbPacking list1* D5 Audio Selector1* DC 5V Power Adapter1* Type-C Cable1* Screwdriver1* User Manual