[Pre-Sale] Douk Audio VOL-4 Stereo Volume Controller with Remote

Features 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. 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. Parameters 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 Packing List 1 × VOL-4 1 × Remote Control (Without Batteries) 1 × DC 5V Power Adapter 1 × USB Cable 1 × User Manual