Small in size, huge in power

With a small footprint and a 30dB gain range, the TOPPING L50 is a desktop amp that fits practically anywhere and powers just about anything.

Twice the power of the L30

The L50 uses a newly redesigned NFCA circuit based on the one used in the A30 Pro. It provides twice the power of the L30 at higher impedances, while maintaining the same ultra-low noise and high dynamic range.

Top-of-the-line NFCA performance

Enjoy top-of-the-line dynamic range, SINAD, and THD+N thanks to the L50’s NFCA circuit. By using negative feedback loops, it reduces fluctuation in the output, resulting in THD of 0.00006%, SINAD of 125, and a dynamic range of 145dB.

Calling all cans

With three gain settings that span almost 30dB, the L50 can power your whole collection of headphones. Its low noise level of 0.3uV means that you won’t hear background noise even on the most sensitive of IEMs, while its max output level of 37Vpp means it can meet the needs of extremely low-sensitivity full-sized headphones.

Auto bypass

When shut off, the L50 automatically outputs the signal to RCA or TRS without amplification, so you can keep the L50 in your audio chain even while using active speakers and/or a DAC’s preamp function.

Product highlights

• Auto bypass
  
• 3 gain settings
• NFCA module
• <0.00006% THD+N
• 145dB DNR
• <0.3uVrms noise
• <0.1Ω output impedance
• Output power: 3500mW x2@16Ω, 540mW x2@300Ω

Specs

Single-ended input

• THD+N@1kHz (A-wt)
• <0.00006% @ output=780mW (32Ω)
• <0.00006% @ output=333mW (300Ω)
• THD 20-20kHz (90kBW)
• <0.00008% @output=780mW (32Ω)
• <0.00008% @output=76mW (300Ω)
• SNR Max out 1kHz (A-wt): 145dB
• SNR 50mV OUT 1kHz: 104dB
• Dynamic range 1kHz (A-wt): 145dB
• Frequency response: 20Hz-40kHz (±0.05dB)
• Output level
• 35Vpp @G=L
• 35Vpp @G=M
• 37Vpp @G=H
• AP measured noise level (A-wt)
• <0.7uVrms @G=L 
• <0.7uVrms @G=M
• <1.2uVrms @G=H
• Actual noise level (A-wt)
• <0.3uVrms @G=L 
• <0.3uVrms @G=M
• <1.0uVrms @G=H 
• Channel crosstalk@1kHz: -119dB
• Input sensitivity
• 60Vrms @G=L 
• 12Vrms @G=M
• 2.7Vrms @G=H 
• Gain
• -14.3dB @G=L 
• -0.1dB @G=M
• 13.9dB @G=H 
• Output impedance: <0.1Ω

Balanced input

• THD+N@1kHz (A-wt)

• <0.00006% @ output=780mW (32Ω)
• <0.00006% @ output=333mW (300Ω)

• THD 20-20kHz (90kBW)
• <0.0001% @output=780mW (32Ω)
• <0.0001% @output=76mW (300Ω)
• SNR Max out 1kHz (A-wt): 140dB
• SNR 50mV OUT 1kHz: 104dB
• Dynamic range 1kHz (A-wt): 140dB
• Frequency response: 20Hz-40kHz (±0.1dB)
• Output level
• 6.6Vpp @G=L
• 35Vpp @G=M
• 37Vpp @G=H
• AP measured noise level (A-wt)
• <0.7uVrms @G=L 
• <0.7uVrms @G=M
• <1.2uVrms @G=H
• Actual noise level (A-wt)
• <0.3uVrms @G=L 
• <0.3uVrms @G=M
• <1.1uVrms @G=H 
• Channel crosstalk@1kHz: -113dB
• Input sensitivity
• 12.7Vrms @G=L 
• 12Vrms @G=M
• 2.7Vrms @G=H 
• Gain
• -14.5dB @G=L 
• -0.3dB @G=M
• 13.7dB @G=H 
• Output impedance: <0.1Ω

Output power

• 3500mW x2 @16Ω THD+N <0.1%
• 2800mW x2 @32Ω THD+N <0.1%
• 2000mW x2 @64Ω THD+N <0.1%
• 540mW x2 @300Ω THD+N <0.1%
• 290mW x2 @600Ω THD+N <0.1%

6.53 x 5 x 1.6” (16.6 x 12.9 x 4.1cm)

Adapter impedance: <8Ω

What’s included

• TOPPING L50
• AC adapter
• 6.35mm to 3.5mm adapter
• User manual
• Warranty card

What pairs well

• TOPPING E50 DAC

Featured reviews

"Outstanding levels of transparency and resolution." -SoundNews

"Looks sleek...performs really well...excellent range of compatibility...all in all a really solid stack." -Passion for Sound

"The amplifier is great, like A90 great." -Z Reviews

Apos Promise

• Free Priority Shipping
• Price Match Guarantee
• Apos One-Year Transferable Warranty
• 45-Day Returns