Topping A Series A50 III Desktop Headphone Amplifier, Black
Key Features
- High output for demanding headphones
- Uses the same NFCA module as the A50s, improving low-noise performance
- Features 4.4mm and 6.35mm headphone outputs, as well as TRS and RCA in
- Three-stage gain selection, low, mid, and high, provide flexibility for different headphones
- 12V trigger for integration with your desktop hi-fi system
Topping A Series A50 III Desktop Headphone Amplifier, Black Overview
The Topping A Series A50 III puts high-quality headphone amplification directly on your desktop, delivering clean and powerful audio for solo listening—all at an attractive price point. It features the same NFCA (Nested Feedback Composite Amplifier) technology originally used in the flagship A90D Headphone Amplifier, which is a module designed to deliver ultra-low noise levels (0.3uVrms) and a high dynamic range of 144dB, making it ideal for both low- and high-impedance headphones.
With both balanced 4.4mm and single-ended 6.35mm headphone outputs, as well as RCA and TRS balanced inputs, the A50 III gives you flexible connectivity options. It also features three-stage gain selection, compared to the A50S' two. These are low, medium, and high, letting you match the amplifier's output to your headphones' needs. Whether you're using sensitive in-ear monitors or power-hungry planar magnetic headphones, you can adjust the gain to achieve improved performance without unwanted noise or distortion.
With a CNC-machined aluminium chassis, the A50 III offers excellent electromagnetic shielding and a sleek build that fits neatly into any setup. Its 3500mW balanced outputs provide plenty of headroom for demanding headphones, while the 12V trigger input allows it to power on and off in sync with other compatible devices, such as its recommended pairing, the Topping D50 III DAC. This makes it a convenient and powerful choice for both desktop and high-fidelity setups.
Product Ref: 325574
Full Description
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What’s in the Box?
- Topping A50 III Headphone Amplifier
- 15V DC adaptor
- 6.35 to 3.5mm adaptor
- Product information card
Specifications
THD+N @1kHz A-wt
| Single-ended IN / Single-ended OUT | <0.00006 @Output=500mW(32Ω)<0.00006 @Output=80mW(300Ω) |
|---|---|
| Balanced IN / Single-ended OUT | <0.00007 @Output=500mW(32Ω)<0.00006 @Output=80mW(300Ω) |
| Single-ended IN / Balanced OUT | <0.00007 @Output=2000mW(32Ω)<0.00006 @Output=320mW(300Ω) |
| Balanced IN / Balanced OUT | <0.00012 @Output=2000mW(32Ω)<0.00008 @Output=320mW(300Ω) |
THD @20-20kHz 90kBW
| Single-ended IN / Single-ended OUT | <0.0002 @Output=500mW (32Ω)<0.0001 @Output=80mW(300Ω) |
|---|---|
| Balanced IN / Single-ended OUT | <0.0005 @Output=500mW (32Ω)<0.0003 @Output=80mW(300Ω) |
| Single-ended IN / Balanced OUT | <0.0002 @Output=2000mW(32Ω)<0.0001 @Output=320mW(300Ω) |
| Balanced IN / Balanced OUT | <0.0002 @Output=2000mW(32Ω)<0.0001 @Output=320mW(300Ω) |
SNR @MAX OUT 1kHz A-wt
| Single-ended IN / Single-ended OUT | 141dB |
|---|---|
| Balanced IN / Single-ended OUT | 136dB |
| Single-ended IN / Balanced OUT | 144dB |
| Balanced IN / Balanced OUT | 137dB |
Dynamic Range @1kHz A-wt
| Single-ended IN / Single-ended OUT | 141dB |
|---|---|
| Balanced IN / Single-ended OUT | 136dB |
| Single-ended IN / Balanced OUT | 144dB |
| Balanced IN / Balanced OUT | 137dB |
Frequency Response
| Single-ended IN / Single-ended OUT | 20Hz-40kHz(±0.05dB)10Hz-100kHz(±0.1dB) |
|---|---|
| Balanced IN / Single-ended OUT | 20Hz-40kHz(±0.1dB)10Hz-100kHz(±0.5dB) |
| Single-ended IN / Balanced OUT | 20Hz-40kHz(±0.05dB)10Hz-100kHz(±0.1dB) |
| Balanced IN / Balanced OUT | 20Hz-40kHz(±0.05dB)10Hz-100kHz(±0.1dB) |
Output Level
| Single-ended IN / Single-ended OUT | 21Vpp @G=L21Vpp @G=M21Vpp @G=H |
|---|---|
| Balanced IN / Single-ended OUT | 21Vpp @G=L21Vpp @G=M21Vpp @G=H |
| Single-ended IN / Balanced OUT | 18Vpp @G=L42Vpp @G=M42Vpp @G=H |
| Balanced IN / Balanced OUT | 18Vpp @G=L42Vpp @G=M42Vpp @G=H |
AP Measured Noise Level @A-wt
| Single-ended IN / Single-ended OUT | <0.7uVrms @G=L<0.7uVrms @G=M<1.1uVrms @G=H |
|---|---|
| Balanced IN / Single-ended OUT | <0.7uVrms @G=L<0.7uVrms @G=M<1.1uVrms @G=H |
| Single-ended IN / Balanced OUT | <0.9uVrms @G=L<0.9uVrms @G=M<2.1uVrms @G=H |
| Balanced IN / Balanced OUT | <0.9uVrms @G=L<0.9uVrms @G=M<2.1uVrms @G=H |
Actual Noise Level @A-wt
| Single-ended IN / Single-ended OUT | <0.3uVrms @G=L<0.3uVrms @G=M<1.0uVrms @G=H |
|---|---|
| Balanced IN / Single-ended OUT | <0.3uVrms @G=L<0.3uVrms @G=M<1.0uVrms @G=H |
| Single-ended IN / Balanced OUT | <0.7uVrms @G=L<0.7uVrms @G=M<2.0uVrms @G=H |
| Balanced IN / Balanced OUT | <0.7uVrms @G=L<0.7uVrms @G=M<2.0uVrms @G=H |
Input Sensitivity
| Single-ended IN / Single-ended OUT | 13Vrms @G=L8.0Vrms @G=M1.9Vrms @G=H |
|---|---|
| Balanced IN / Single-ended OUT | 9.2Vrms @G=L8.0Vrms @G=M1.9Vrms @G=H |
| Single-ended IN / Balanced OUT | 13Vrms @G=L7.8Vrms @G=M1.9Vrms @G=H |
| Balanced IN / Balanced OUT | 9.2Vrms @G=L7.8Vrms @G=M1.9Vrms @G=H |
Gain
| Single-ended IN / Single-ended OUT | -12.0dB @G=L0dB @G=M11.9dB @G=H |
|---|---|
| Balanced IN / Single-ended OUT | -12.0dB @G=L0dB @G=M11.7dB @G=H |
| Single-ended IN / Balanced OUT | -6.0dB @G=L6.0dB @G=M17.9dB @G=H |
| Balanced IN / Balanced OUT | -6.0dB @G=L6.0dB @G=M17.9dB @G=H |
Input Impedance
| Single-ended IN | 10.0kΩ @G=L2.5kΩ @G=M2.5kΩ @G=H |
|---|---|
| Balanced IN | 2.0kΩ @G=L2.0kΩ @G=M2.0kΩ @G=H |
Output Impedance
| Single-ended OUT | <0.1Ω |
|---|---|
| Balanced OUT | <0.2Ω |
Output Power
| Single-ended OUT | 2150mW x 2 @16Ω THD+N <0.1 1400mW x 2 @32Ω THD+N <0.1 190mW x 2 @300Ω THD+N <0.1 100mW x 2 @600Ω THD+N <0.1 |
|---|---|
| Balanced OUT | 3500mW x 2 @32Ω THD+N <0.1 2700mW x 2 @64Ω THD+N <0.1 760mW x 2 @300Ω THD+N <0.1 395mW x 2 @600Ω THD+N <0.1 |
Load Impedance
| Single-ended IN / Single-ended OUTBalanced IN / Single-ended OUTSingled-ended IN / Balanced OUTBalanced IN / Balanced OUT | >8Ω |
|---|
Product Information
| Dimensions (including protrusions) | 125 x 140 x 26 mm |
|---|---|
| Weight | 495g |
| Power input | DC 15V/1A @DC base 5.5*2.1 |
| Signal input | 1 x TRS (L+R)1 x RCA (L+R) |
| Headphone amplifier output | 1 x 6.35mm headphone output jack1 x 4.4mm headphone output jack |
| Other connectors | 12V trigger in (3.5mm jack)Type-C FW port |
| Gain | Three types (H/M/L) |
| Standby power consumption | <0.3W |
| Product code | TOP-A50MK3-B |
| EAN | 6974268483643 |
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