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Black desktop headphone amplifier with 6.35 mm and 4-pin XLR outputs

Topping Inc.

Topping L50 NFCA Headphone Amplifier 3500mW portable audio

SKU CH-FCN9-61S5R

Portable headphone amplifier delivers 3500 mW per channel with 145 dB dynamic range and 0.00006 % THD+N

  • TypeBoomboxes
  • ColorBlack
  • New NFCA circuit delivers 3500 mW output power
  • 3 µV ultra-low noise ensures silent background for IEMs
  • Three gain settings cover low-sensitivity over-ears to high-sensitivity IEMs
  • 145 dB dynamic range with 0.00006 % THD+N for transparent sound
  • Pass-through mode routes input to RCA or TRS outputs for active speakers

New NFCA Circuit

The redesigned NFCA circuit delivers double the power at 300 ohms compared to the previous model while maintaining 0.3uV ultra low noise and 145dB dynamic range. THD+N measures 0.00006% for transparent signal reproduction. It suits listeners who want high output without added noise.

Three Gain Options and Impedance Flexibility

Three gain settings cover low sensitivity over ear headphones through high sensitivity IEMs without audible background hiss. The amplifier drives a wide impedance range so you can select headphones freely rather than matching amp to load. This removes the need to own multiple amplifiers for different headphone types.

3500mW Balanced and Single Ended Outputs

Balanced 4 pin XLR and 6.35mm single ended outputs provide up to 3500mW per channel for demanding full size headphones. Input pass through sends the source signal directly to RCA or TRS when the unit is off for use with active monitors. Buyers needing Bluetooth or battery operation should look elsewhere.

Highlights

  • New NFCA circuit delivers 3500 mW output power
  • 3 µV ultra-low noise ensures silent background for IEMs
  • Three gain settings cover low-sensitivity over-ears to high-sensitivity IEMs
  • 145 dB dynamic range with 0.00006 % THD+N for transparent sound
  • Pass-through mode routes input to RCA or TRS outputs for active speakers

Specifications

TypeBoomboxes
ColorBlack

Questions about this item

How do I pick the right gain setting for my headphones?

The amplifier provides three gain options that cover a wide range, so you can match low-sensitivity full-size headphones or high-sensitivity IEMs without hearing background noise thanks to the 0.3uV noise floor.

What does the 3500mW output actually deliver when I plug in my headphones?

The new NFCA circuit delivers up to 3500mW per channel, providing twice the power at 300 ohms compared to the earlier L30 design while maintaining 0.00006% THD+N and 145dB dynamic range.

Which connections does the 6.35mm and 4-pin XLR support, and what limits apply?

The 6.35mm jack gives single-ended output and the 4-pin XLR provides balanced output; both are driven by the same ultra-low impedance amplifier stage, and the balanced TRS pass-through sends the input signal directly to active speakers when the unit is off.

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