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TOPPING L50 NFCA Ultra Low Noise Hi-Res Audio Headphone Amplifier With SE+BAL Input 6.35mm/XLR Output


Bypass output when power off

Hi-Res Audio

3 step gain settings

NFCA modules

THD+N 0.00006%

145dB DNR

<0.3ɥVrms noise

<0.1Ω output impedance

3500mW x 2 @16Ω

540mW x 2 @300Ω

* The actual noise level is obtained by boosting the noise of L50 by 100 times using a low noise amplifier in front of the APX555B then dividing the measured noise by 100 times.

New NFCA circuit

Redesigned new NFCA circuit based on the same working principle as the one in A30 Pro. It provides 2x the power at 300Ω compared to L30. The new circuit shares the same 0.3ɥV ultra-low noise and 145dB dynamic range as well as 0.00006% THD+N.

*3500mW x 2 @16Ω

*2800mW x 2 @32Ω

*2000mW x 2 @64Ω

*540mW x 2 @300Ω

*290mW x 2 @600Ω

Sound quality is never a problem

With the help of NFCA, L50 easily reaches the top of the industry, and it has almost perfect performance regardless of distortion, dynamic range, and multi-tone testing.

Wide range of adaptation to headphone impedance

Since L50 meets the requirements of multiple ideal amps at the same time, it leads you break the inertial thinking in the choice of amps: from now on, there is no need to choose amps based on the impedance of headphones. All you need to do is choose L50, and then choose your favorite headphones, because L50 can easily drive them well.

*37Vpp high output voltage

*3500mW x 2 high output power

*<0.1Ω low output impedance

Easily match with high or low sensitivity

L50 has three gain options. Covering a wide gain range is sufficient to meet the needs of low-sensitivity full-sized over-ears to high sensitivity lEMs. With the help of extremely low noise 0.3ɥV, even IEMs will not hear any background noise.

Input pass through

When shutting down, the input signal is directly output to RCA or TRS without amplification, which will be more suitable for working with active speakers/monitor speakers when the DAC has pre-amp function.

E50 will be the best DAC for L50

E50 and L50 have fully matched design languages and styles, and signals can transmit in balanced by TRS.

E50 uses ES9068AS sub-flagship chip, supports PCM, DSD, MQA decoding.

L50 different from other models

Amplifier: SE

Input: SE + BAL

Output: 6.35mm, 4pin XLR

Pass through: YES

Gain: -14/0/14dB

SE power: 3500mW x 2(16Ω)

SE output impedance: <0.1Ω


L50 headphone amplifier specification


THD+N(A-weight): <0.00006%@output=780mW(32Ω)


THD(no-weight 90kBw): <0.00008%@@output=780mW(32Ω)


SNR max out 1kHz(A-weight): 145dB

SNR 50mW out 1kHz: 104dB

Dynamic range 1kHz(A-weight): 145dB

Frequency response: 20Hz-40kHz(±0.5dB)

Output level: [email protected]=L

           [email protected]=M

           [email protected]=H

AP measured noise level(A-weight): <0.7ɥ[email protected]=L

                            <0.7ɥ[email protected]=M

                             <1.2ɥ[email protected]=H

Actual noise level(A-weight): <0.3ɥ[email protected]=L

                        <0.3ɥ[email protected]=M

                        <1.0ɥ[email protected]=H

Channel [email protected]: -119dB

Input impedance: [email protected]=L

               [email protected]=M

               [email protected]=H

Gain: [email protected]=L

    [email protected]=M

    [email protected]=H

Output impedance: <0.1Ω

Output power: 3500mW x 2 @16Ω THD+N <0.1%

2800mW x 2 @32Ω THD+N <0.1%

2000mW x 2 @64Ω THD+N <0.1%

540mW x 2 @300Ω THD+N <0.1%

290mW x 2 @600Ω THD+N <0.1%

Adapter impedance: >8Ω

* Note: The actual noise level is obtained by boosting the noise of L50 by 40dB using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.



AC adapter

6.35mm to 3.5mm adapter

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Free Shipping

All listed items will be shipped through Registered Airmail with tracking number if there is no extra shipping option or shipping description at the product page.

Economy shipping: Will be shipped without tracking number.(because of the covid-19 affects, economy airmail parcel is easy to lose, pls place the order by choosing registered airmail, or you purchase one more product , we can send together via registered airmail)

Registered Airmail : Will be shipped via such as Hong Kong post , Singapore Post, you can leave us a message if you have any requirements about the shipping method .

We can ship the parcel to Canada and Europe countries via tax-inclusive shipping method with extra charge, pls leave us a message if needed.

Express service: Will be shipped via DHL/EMS/UPS/FedEx,Canada and Europe countries will be shipped via tax-inclusive shipping method for free.

  • Views: 373
  • Brand: TOPPING
  • Product Code: L50
  • Availability: In Stock
  • $169.00

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