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Silver desktop headphone amplifier with 6.35 mm and 4-pin XLR outputs, gain switch and input pass-through

Topping Inc.

Topping L50 NFCA Headphone Amplifier Silver

SKU CH-JZY0-NM0D1

Delivers up to 3500 mW per channel with 0.3 µV noise, 145 dB dynamic range and 0.00006 % THD+N

  • TypeBoomboxes
  • ColorSilver
  • New NFCA circuit delivers 3500 mW per channel into 300 Ω
  • Three gain settings cover high-sensitivity IEMs and low-sensitivity over-ears
  • 3 µV noise floor keeps background silent even with sensitive monitors
  • 145 dB dynamic range and 0.00006 % THD+N for transparent reproduction
  • 35 mm and 4-pin XLR outputs plus TRS pass-through for active speakers

Topping L50 NFCA headphone amplifier

The Topping L50 is a desktop headphone amplifier built around a redesigned NFCA circuit. It provides balanced and single-ended outputs for use with in-ear monitors or full-sized headphones. A three-position gain switch accommodates both low and high sensitivity models. The unit also functions as a two-channel preamplifier with input pass-through when powered off.

3500 mW output and 145 dB dynamic range

At 300 ohms the amplifier delivers up to 3500 mW per channel, giving ample headroom for demanding planar or high-impedance headphones. Ultra-low noise of 0.3 µV and a dynamic range of 145 dB ensure a silent background even with highly sensitive IEMs. THD+N measures 0.00006 percent, so distortion remains negligible across the usable volume range. Very low output impedance allows consistent performance across a wide impedance spread without needing to match amplifier to headphone.

6.35 mm and 4-pin XLR headphone outputs

The front panel offers a 6.35 mm single-ended jack and a 4-pin XLR balanced connector for direct headphone connection. Rear-panel RCA and TRS inputs accept signals from a DAC such as the Topping E50, and balanced transmission is supported via TRS. When the amplifier is switched off, the input signal passes directly to the RCA or TRS outputs for use with active or monitor speakers.

Highlights

  • New NFCA circuit delivers 3500 mW per channel into 300 Ω
  • Three gain settings cover high-sensitivity IEMs and low-sensitivity over-ears
  • 3 µV noise floor keeps background silent even with sensitive monitors
  • 145 dB dynamic range and 0.00006 % THD+N for transparent reproduction
  • 35 mm and 4-pin XLR outputs plus TRS pass-through for active speakers

Specifications

TypeBoomboxes
ColorSilver

Questions about this item

Will the L50’s 3500 mW output overdrive my older 300-ohm headphones?

The amplifier delivers up to 3500 mW and the new NFCA circuit provides twice the power at 300 ohms compared to the earlier L30, so high-impedance models are driven cleanly without clipping.

How can I confirm the 0.3 µV noise floor and 145 dB dynamic range are actually achieved after I connect it?

With the gain switch set to the lowest position, play silence through sensitive IEMs — you should hear no background hiss, which verifies the ultra-low noise and high dynamic range in practice.

Does the box include the 4-pin XLR and 6.35 mm cables I need for balanced and single-ended headphones?

The unit provides a 4-pin balanced XLR output and a 6.35 mm single-ended output; headphone cables with matching plugs are not included and must be purchased separately.

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