TOPPING L50 Linear Headphone Amplifier
GRAPH
Thank you for purchasing linear headphone amplifier L50! L50 is a high performance linear headphone amplifier that supports balanced and single-ended inputs and single-ended outputs. It is equipped with two different types of headphone jacks and 3 gain settings. Now we recommend first to read this manual for you to correctly use all the functions of L50.
Contents list
| L50 | X 1 |
| AC adapter | X 1 |
| 6.35mm to 3.5mm adaptor | X 1 |
| User manual | X 1 |
| Warranty card | X 1 |
Note: You can download the user manual on http://www.topping.audio/
Description
- Power indicator The light will be always on when the L50 is turning on, and goes off when it is turning off, blinks to indicate unexpected output.
- Input switch Switch to SE input/ BAL input, or turn off
- Gain switch H / M / L respectively corresponds to 14dB / OdB / -14dB
- 4-PIN-XLR headphone output jack Suitable for headphones with 4-PIN-XLRjack
- 6.35mm headphone output jack Suitable for headphones with 6.35mm jack
- Volume knob Used to adjust the volume. It is recommended to turn down the volume before playing music.
- Right channel 6.35mm TRS Balanced input
- Left channel 6.35mm TRS Balanced input
- Left channel single-ended RCA input
- Right channel single-ended RCA input
- Left channel single-ended RCA passthrough output
- Right channel single-ended RCA passthrough output
- Right channel 6.35mm TRS Balanced passthrough output
- Left channel 6.35mm TRS Balanced passthrough output
- Firmware upgrade interface This interface is for firmware upgrade only
- Power input AC15V/1 A 50Hz/60Hz
Note: The rear panel outputs are input passthrough when the unit is off and are off when the unit is on.
| TRS In | RCA In | |||||
| Headphone Out | RCA Out | TRS Out | Headphone Out | RCA Out | TRS Out | |
| When turn-on | ✓ | ✕ | ✕ | ✓ | ✕ | ✕ |
| When tum –o ff | ✕ | ✕ | ✓ | ✕ | ✓ | ✕ |
Product specifications
| Dimension n | 16. 6cm x 1 2.9cm x 4.1cm |
| Weigh t | 545g |
| Power | 1SVAC /1A 50Hz/60Hz@DC base 5.5*2.5 |
| Gain | L/M/H |
| Amplifier inputs | 1 x BAL |
| 1 x SE | |
| Headphone Amplifier outputs | 1 x 6.35mm headphone output jack |
| 1 x 4-PIN-XLR headphone output jack | |
| Pre-amplifier outputs | 1 x BAL |
| 1 x SE | |
| Power consumption | <7.5W |
| L50 Headphone Amplifier specifications | ||
| SE IN | BALIN | |
| THD+N@1kHz (A-wt) | <0.00006% @ Output=780mW(32Ω) | <0.00006% @Output=780mW(32Ω) |
| <0.00006% @ Output=333mW(300Ω) | <0.00006% @Output=333mW (300Ω) | |
| THO 20-20kHz (90kBW) | <0.00008% @ Output=780mW(32Ω) | <0.0001% @Output=780mW ( 32Ω) |
| <0.00008% @Output =76mW( 300Ω ) | <0.0001% @ Output=76mW(300Ω) | |
| SNR MAX OUT 1kHz (A-wt) | 145dB | 140dB |
| SNR 50mV OUT 1kHz | 104dB | 104dB |
| Dynamic Range 1kHt ( A-wt) | 145d8 | 140dB |
| Frequency Response | 20Hz-40kHz (±0.05d8) | 20Hz-40kHz (±0.1d8) |
| Output Level | 35Vpp@G=L | 6.6Vpp@G=L |
| 35Vpp@G=M | 35Vpp@G=M | |
| 37Vpp@G=H | 37Vpp@G=H | |
| AP measured nois, le vel ( A-wt) | <0.7uVrms @G=L | <0.7uVrms @G=L |
| <0.7uVrms @G=M | <0.7uVrms @G=M | |
| <1.2 uVrms @G=H | <1.2 uVrms @G=H | |
| Actual noise l evel* ( A-wt) | <0.3uVrms @G=L | <0.3uVrms @G=L |
| <0.3uVrms @G=M | <0.3uVrms @G=M | |
| <1.0uVrms @G=H | <1.1uVrms@G=H | |
| Channel Cross talk@1kHz | -119dB | -113d8 |
| Input sensitivity | 60Vrms @G=L | 12.7Vrms @G=L |
| 12Vrms @G=M | 12Vrms @G=M | |
| 2.7Vrms @G=H | 2.7Vrms @G=H | |
| Gain | -14.3d8 @G=L | -14.5d8 @G=L |
| -0.1d8 @G=M | -0.3d8 @G=M | |
| 13.9d8 @G=H | 13.7d8 @G=H | |
| Output Impedance | < 0.10 | < 0.10 |
| Output Power | 3400mW x 2 @160 THD+N<0.1% | |
| 2800mW x 2 @320 THD+N<0.1% | ||
| 2000mW x 2 @640 THD+N<0.1% | ||
| 540mW x 2 @3000 THD+N<0.1% | ||
| 290mW x 2 @6000 THD+N<0.1% | ||
| Adapter Impedance | >80 | |
- 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.
Precautions for daily use
- The output jacks shall not be grounded or short-circuited
- Do not keep the unit in a hot, humid environment or hit the unit strongly.
- Opening the case instantly voids the warranty!
- Indoor use only.
