Douk Audio | Douk Audio DC 12V 35W Regulated Linear Power Supply Low Noise PSU for HiFi Audio Preamp DAC Audio Device

FeaturesCleaner Linear Power Upgrade: Ordinary switching adapters can introduce ripple, electrical noise, and interference into sensitive audio gear. As a linear power supply, the D2-PRO helps create a darker background, smoother highs, and cleaner detail for a more refined listening experience.28μV Ultra-Low Ripple: Ripple noise is measured at only 28μV RMS under no-load conditions, giving sensitive audio circuits a cleaner power foundation. By reducing power-related noise at the source, it supports steadier imaging, cleaner dynamics, and more natural detail. Low-Noise Power Architecture: A sealed toroidal transformer, EMI suppression circuit, high-speed rectifier, large-capacity matrix filtering, and LDO regulator work together to isolate grid interference, smooth DC output, and deliver stable, well-regulated DC power.35W Dual DC Output: With up to 35W output power and 2.5A current capacity, the D2-PRO can run one or two compatible devices from the same clean regulated source. Dual DC outputs help create a more consistent low-noise power setup for compact HiFi systems.  Made for HiFi Audio Systems: Designed for 12V DACs, preamps, headphone amps, streamers, digital interfaces, audio switches, and network switches. The aluminum chassis helps improve heat dissipation and reduce external interference for stable daily use.Q: The D2-PRO have two output terminals. Can both terminals be used simultaneously at full rated current?A: No. You can connect two output devices at the same time, but the total curent drawn from both outputs must not exceed the rated output current.Q: The DC output jacks of D2-PRO are 5.5mm/2.5mm, and my device's power jack is 5.5mm/2.1mm. Are they compatible?A: Yes.Q: Is the output voltage of the D2-PRO adjustable?A: The output voltage is typically fixed and can only be fine-tuned within about ±0.5V. Normally no adjustment is required.Q: My device requires a 12V / 1A power supply. Can I safely use the D2-PRO (12V / 2.5A)?A: Yes. The 2.5A rating indicates the maximum available current. Your device will only draw the current it requires.Q: Why do the D2-PRO generate more heat than switching power supplies? Is it safe?A: It is normal. Linear power supplies operate at lower efficiency, so more energy is converted into heat. The D2-PRO is safe when used within rated load limits.ParametersBrand: Douk AudioModel: D2 PROOutput Interface: Dual DC OutputsOutput Voltage: DC 12VMax. Output Current: 2.5APower Capacity: 35WRipple Noise: (No load) 28μV RMS Fuse Replacement: Supported, 5mm × 20mm, 1ADC Output Connector: 5.5 × 2.5 mm, positive inside and negative outside, compatible with 5.5 × 2.1 mm plugsInput Voltage: AC 110V–120V / AC 220V–240VDimensions (W × D × H): 115 × 161 × 62 mm / 4.53 × 6.34 × 2.44 inNet Weight: 1.33 kg / 2.93 lbPackage Weight: 2.0 kg / 4.41 lbPacking List1* D2 PRO1* DC Cable1* Power Cable