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Small silver metal box with XLR and 4.4mm headphone jacks on front panel

LORDWORLD

LORDWORLD U5PRO Headphone Amplifier XLR 4.4mm 1500mW 18-600Ω Replaceable Op-Amps

SKU CH-AZ8C-6RHFT

Fully balanced headphone amplifier delivers 1500mW into 32Ω, drives 18–600Ω loads, and offers swappable op-amp slots for XLR and 4.4mm headsets

  • Fully balanced circuit runs at ±14 V for transparent sound
  • 1500 mW at 32 Ω drives 18–600 Ω headphones
  • OP42 and BUF634 architecture yields low distortion and high detail
  • Swappable op-amp slots support OP17, AD797, AD843, AD847, OPA627
  • Compact portable build enhances XLR and 4.4 mm headphone audio

Balanced Headphone Amplifier

The LORDWORLD U5PRO is a fully balanced headphone amplifier built for listeners who want transparent sound from XLR and 4.4 mm connections. Its circuit operates at ±14V from a DC 5V input, delivering clean frequency response and transient dynamics. It suits audiophiles seeking portable, high-fidelity amplification.

Build Integration

The compact chassis fits easily on a desk or in a travel kit, requiring only a 5V DC source to reach its full ±14V internal rails. It drives loads from 18 to 600 impedance, reaching 1500mW at 32 load, so it pairs with sensitive IEMs and demanding full-size cans alike. No separate power supply is needed beyond the 5V input.

Replaceable Op-Amp Slots

The classic OP+BUF topology uses OP42 and BUF634 as standard, but sockets accept OP17, AD797, AD843, AD847, and OPA627 for tonal tailoring. Swapping op-amps changes gain character, soundstage width, and detail retrieval without soldering. Buyers who want fixed-gain simplicity or digital processing will not find those features here.

Highlights

  • Fully balanced circuit runs at ±14 V for transparent sound
  • 1500 mW at 32 Ω drives 18–600 Ω headphones
  • OP42 and BUF634 architecture yields low distortion and high detail
  • Swappable op-amp slots support OP17, AD797, AD843, AD847, OPA627
  • Compact portable build enhances XLR and 4.4 mm headphone audio

Specifications

BrandLORDWORLD

Questions about this item

At what load does the 1500mW output limit appear during extended listening?

The 1500mW rating is measured at a 32 load, so sustained high-volume use with lower-impedance headphones will hit that ceiling first.

How hot or noisy does the unit get when running all day?

The fully balanced circuit runs on ±14V rails from a DC 5V input with a pure analog OP+BUF design, so it produces minimal heat and no fan noise during continuous operation.

What source and headphone connections must I already have to use this amplifier?

You need a source with XLR or 4.4mm balanced outputs and headphones wired for XLR or 4.4mm balanced termination within the 18-600 range.

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