We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Compact black desktop headphone amplifier with 6.35mm and 3.5mm jacks

LORDWORLD

LORDWORLD U3 Mini Hi-Fi Amplifier Class A 6.35mm 3.5mm RCA DC 5V

SKU CH-4T2V-4FNG4

Class A headphone amplifier with swappable op-amp socket, 6.35 mm and 3.5 mm outputs, and RCA input for desktop audio systems

  • Class A operation with TI NE5532 op-amp delivers warm, detailed sound
  • Wide 5-20V DC input maintains 26V internal rail for ultra-low noise
  • Swappable op-amp socket lets you customise the sound signature
  • 1300mA output transistors drive high-impedance headphones like HD600, DT880, K701
  • Compact desktop form factor with 6.35mm, 3.5mm and RCA connections

What it is and who it's for

The LORDWORLD U3 is a compact Class A headphone amplifier designed for desktop listening. It accepts RCA line-level signals and drives 6.35mm and 3.5mm headphones with a warm, detailed presentation. The socketed TI-NE5532 op-amp invites DIY experimentation for enthusiasts who enjoy rolling components.

Thermals noise and power

A DC 5-20V wide-range input feeds an internal 26V rail, delivering 1300mA of Class A bias current through the output transistors. This topology yields ultra-low distortion and excellent background noise performance across a wide frequency response. The small chassis runs warm during continuous operation, which is normal for pure Class A designs.

What it replaces and when to upgrade

It replaces the headphone output on a motherboard, monitor or entry-level DAC for users who need more authority with high-impedance loads. Models such as the HD580, HD600, HD650, K701, K702, Q701, DT880, T70, T90, SR225, SR325 and RS1e are driven with greater control and soundstage. Buyers needing balanced outputs, wireless streaming or speaker-level power should look elsewhere.

Highlights

  • Class A operation with TI NE5532 op-amp delivers warm, detailed sound
  • Wide 5-20V DC input maintains 26V internal rail for ultra-low noise
  • Swappable op-amp socket lets you customise the sound signature
  • 1300mA output transistors drive high-impedance headphones like HD600, DT880, K701
  • Compact desktop form factor with 6.35mm, 3.5mm and RCA connections

Specifications

BrandLORDWORLD

Questions about this item

How do I connect the DC 5V power and audio sources to the U3 amplifier?

Plug the supplied DC 5V adapter into the barrel jack, then connect your source to the RCA inputs; the headphone outputs accept 6.35mm or 3.5mm plugs directly.

Which user-serviceable part will need attention after extended Class A operation?

The socketed TI-NE5532 op-amp can be swapped if it ages or if you want a different sound signature; no other components are designed for routine replacement.

At what point does the 1300mA Class A output stage hit its thermal limit during long sessions?

The amplifier runs in pure Class A up to 1300mA per channel, so sustained high-volume use with demanding loads like the HD600 or DT880 will make the chassis the first limiting factor.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.