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Small silver desktop headphone amp with 3.5mm and 6.35mm jacks

LORDWORLD

LORDWORLD U3 PRO Headphone Amplifier 1500mW 3.5mm 6.35mm streaming audio

SKU CH-PEYA-Z6SVW

Delivers up to 1500mW at 32 ohms to drive 18-600 ohm headphones, uses a voltage boost circuit for ±14V from DC 5V, features replaceable OP42 and BUF634 op-amps, and includes RCA, 3.5mm AUX.

  • Drives 18 to 600 headphones with 1500mW at 32
  • Voltage boost gives ±14V from DC 5V for low distortion
  • Replaceable OP42 and BUF634 op-amps allow sonic tuning
  • RCA, 3.5mm AUX in plus 3.5mm and 6.35mm headphone out
  • Compact 689232mm chassis fits any desktop space

Compact Desktop Headphone Amplifier

The LORDWORLD U3 PRO is a mini Class A headphone amplifier designed for desktop listening. It delivers up to 1500mW at 32 ohms and drives headphones from 18 to 600 ohms. A built-in voltage boost circuit maintains ±14V from a DC 5V supply for ultra-low distortion.

Check Your Source Connections and Power

Verify your audio source provides either stereo RCA or a 3.5mm AUX line-level output. Ensure you have a suitable DC 5V power adapter, as the unit requires external power to operate. Confirm your headphones terminate in a 3.5mm or 6.35mm plug for direct connection.

Fits a Minimal Desktop Audio Chain

The amplifier measures 689232mm, occupying minimal desk space between a source and headphones. Its pluggable op-amp socket accepts OP17, AD797, AD843, AD847, or OPA627 upgrades for sound tuning. Dual 3.5mm and 6.35mm outputs free you from carrying separate adapters for different headphones.

Highlights

  • Drives 18 to 600 headphones with 1500mW at 32
  • Voltage boost gives ±14V from DC 5V for low distortion
  • Replaceable OP42 and BUF634 op-amps allow sonic tuning
  • RCA, 3.5mm AUX in plus 3.5mm and 6.35mm headphone out
  • Compact 689232mm chassis fits any desktop space

Specifications

BrandLORDWORLD

Questions about this item

What comes in the box with the U3 PRO and do I need to buy a power supply separately?

The amplifier has a DC 5V input; a compatible 5V power adapter is required but not confirmed as included.

Which op-amp should I choose for the replaceable socket — OP42, OP17, AD797, AD843, AD847 or OPA627?

The unit ships with OP42 and BUF634 installed; the socket accepts OP17, AD797, AD843, AD847 or OPA627 for later upgrades.

What does the 1500mW at 32 specification mean for my 18–600 headphones in daily use?

It delivers up to 1500mW into 32 loads, giving clean, high-output drive for low-impedance models and ample headroom for 600 ones.

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