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Unboxing Video
Product Showcase Video
- Upgrade Your HiFi Volume Control: Keep the HiFi system you already enjoy while adding convenient remote volume control. VOL-4 is ideal for fixed-output DACs and streamers, or systems where volume controls are missing or hard to reach—without replacing the rest of your setup.
- More From One Remote: Control volume, tone, power and mute directly from your listening position. Dedicated buttons keep everyday adjustments within easy reach, while one-touch mute handles calls or conversations without changing your preferred volume setting.
- See Every Setting as You Tune: Set volume from 0–99 with clear OLED feedback for every adjustment, making familiar settings easy to revisit. Bass and treble each offer ±9 dB of tuning range, giving you room to shape tonal balance around different music, speakers and listening preferences.
- Keep Your HiFi Signal Clean: VOL-4 adds easier volume control without making signal quality an afterthought. SNR ≥115 dB and THD+N 0.001% maintain very low noise and distortion, while closely matched L/R output adds confidence in consistent stereo performance.
- Built to Fit Your System: Connect VOL-4 between common RCA line-level sources and power amps or active speakers, while Bypass sends the RCA signal directly through when powered but switched off. The GND terminal gives short turntable ground leads a closer grounding point, and 5V USB-C keeps setup and placement flexible.
- Brand: Douk Audio
- Model: VOL-4
- Audio Input: Stereo RCA
- Audio Output: Stereo RCA
- THD+N: 0.001%
- SNR: ≥115 dB
- Frequency Response: 20 Hz–20 kHz (±0.1 dB)
- Input Sensitivity: 2 V
- Input Impedance: 47 kΩ
- Output Impedance: 10 kΩ
- Maximum Output Level: 2 V
- Volume Range: 0–99
- Bass/Treble Adjustment: ±9 dB
- Power Input: USB-C, DC 5V / ＞1A
- Dimensions (W × D × H): 95 × 70 × 30 mm / 3.74 × 2.76 × 1.18 in
- Net Weight: 204 g / 0.45 lb
- Package Weight: 420 g / 0.93 lb
- 1 × VOL-4
- 1 × Power Adapter
- 1 × Remote Control (Batteries Not Included)
- 1 × USB Cable
- 1 × User Manual
User Manual of the Douk Audio VOL-4
FAQs
Q: Why is there still sound after VOL-4 is turned off, and why is it louder?
A: This is normal. When powered but switched off, VOL-4 passes the RCA signal through at full volume, bypassing volume and tone controls. Lower source or downstream volume before switching on/off.
Q: What is the GND terminal used for?
A: If your turntable ground lead is too short, VOL-4 can act as an intermediate grounding point between the turntable and your amplifier or phono preamp, giving you more flexibility in equipment placement.
Q: Why doesn’t the remote control include batteries?
A: The remote requires 2 × AAA batteries, which are not included. Please prepare them separately before use.
Douk Audio VOL-4
The Missing Pieces of Volume Control
A suggestion from a well-known HiFi reviewer sparked the idea: put remote volume control at the core, then build beyond it. As we studied the market and listened to users, the same priorities kept surfacing: finer control, clearer feedback, broader remote access, and even details like grounding—shaping what became VOL-4.
- Audio Input / Output: Stereo RCA
- Volume Range: 0–99
- Bass / Treble Range: ±9 dB
- Frequency Response: 20 Hz–20 kHz ±0.1 dB
- SNR: ≥115 dB; THD+N: 0.001%