TOPPING L70 Full Balanced NFCA Headphone Amplifier User Manual

TOPPING L70 Full Balanced NFCA Headphone Amplifier

Thank you for purchasing the desktop headphone amplifier L70. We hope it could bring you more fun at enjoying music! Before making any connections or using this product, we recommend you read this manual first so that you can use all the features of L 70 correctly and get the most listening pleasure.

Contents list

• L70 X 1
• Remote control X 1
• AC cable X 1
• 6.35 mm to 3.5 mm adaptor X 1
• User manual X 1
• Warranty card X 1

Note: You can download the user manual at http://www.topping.eudio/.

Attribute

Frontpanel

• 1-1 Multi-function touch button
• 1-2 LED screen
• 1-3 Remote control receiver
• 1-4 4-PI N-XLR headphone output jack*
• 1-5 4.4mm balanced headphone output jack
• 1-6 6.35mm headphone output jack
• 1-7 Volume knob

Note: Description of XLR female connector pin definition

1. L+
2. L-
3. R+
4. R-

Rear panel

• 2-1 Right channel balanced XLR+6.35mm TRS combo input*

• 2-2 Left channel balanced XLR+6.35mm TRS combo input*

• 2-3 Left channel single-ended RCA input

• 2-4 Right channel single-ended RCA input

• 2-5 Left channel single-ended RCA output

• 2-6 Righi channel single-ended RCA output

• 2-7 Right channel balanced XLR output#

• 2-8Left channel balanced XLR output#

• 2-9 12V Trigger In/Out
  The 12V Trigger In/Out allows the L70 to be activated by other devices or to activate other devices via a 3.5mm mini phone plug cable. The connected device must be equipped with a 12V Trigger In/Out to use this feature.

• 2-10 Ground lift switch
  The LI FT setting is able to break the ground loop which may happen in a mu lti-device system with multiple
  ground points. Thus eliminating the noise caused by the ground loop. Kee p the setting to “GND” for best performance if the ground loop is not present.

• 2-11 Firmware upgrade interface
  This interface is for firmware upgrades only

• 2-12 Power input
  AC 100 240y 5 OH Z /GOH

• 2-13 Power Switch

Note: Description of female XLR +6.35mm TRS combo

Display

• 3-1 Gain indicator
• 3-2 Input channel
• 3-3 Volume
• 3-4 Mute indicator
• 3-5 Output mode
• 3-6 Output channel

Remote control

• 4-1 Standby
• 4-2 Volume up
• 4-3 Switch to the previous input
• 4-4 All channels output
• 4-5 User setting 1 •
• 4-6 Gain setting
• 4-7 Mute
• 4-8 Output channel switching
• 4-9 Switch to the next input
• 4-10 Volume down
• 4-11 Individual channel outputs
• 4-12 User setting 2*
• 4-13 Brightness setting#

Note: Press and hold the C1 /C2 button for 3 seconds to save the current program (including input channel, output channel, and volume), and “C1 .. ” or “C2 .. ” will be displayed after successfully saving. Short press the C1 /C2 button to use the corresponding program.

L-A has the same brightness as L-2. The differences lie in when there is no operation after 30 seconds under L-A mode, the screen will be automatically turned off, only displaying the current input. You can press any button to light up the screen.

Specifications

Note:
The actual noise level is obtained by boosting the noise of L 70 by 40d B using a low noise amplifier in front of the APx555B then dividing the measured noise by 100 times.

Note: The actual noise level is obtained by boosting the noise of L70 by 40dB using a low noise amplifier in front of the APx555B and then dividing the measured noise by 100 times.

Operation

Power on & off / standby operation

1. Power on: When connects to the power supply, L70 goes into the standby state, and the screen displays a bright dot.
2. Standby setting:
   When it is working, press and hold the mu lti-function touch button on the front panel to enter the standby state and short press to exit the standby state when it is in standby. Or you can directly press the lhe standby button on the remote control to enter or 9)Cit standby state.

Volume setting:

1. The enter and exit of the mute state: Press the mute button on the remote control to set mute, press the mute button again, or adjust the volume to exit the mute state.
2. Volume adjusting: You can directly turn the volume knob or press the volume up or down button on the remote control to adjust the volume. Note that long pressing the volume up/down button on the remote control will quickly adjust the volume, so please be careful in order to protect your hearing.

Note: L70 will memorizes the volume of each output channel when it was last used. The next time the channel is used, the volume will automatically revert to the volume of its last use.

Input channel switching:
Press the multi-function touch button on the front panel or the “Switch to previous input button” and the “Switch to next input button” on the remote control to switch the input in the cycle.

Output settings:
Press the middle button on the remote to switch the output mode: HPA (Headphone amp output only) /PRE (Line Out output only) /HPA+PRE (HPA&PRE output simultaneously).

• HPAor PRE: press button A-All output channels of that mode are available. press button B- Select one of the output channels in that mode.
• HPA+PRE: A button and B button is Invalid. All output channels are available. Cannot select individual channel outputs.

The knob on the front panel:

• Press and hold the knob for 2s – switch the output mode.
• Press the knob – Select one of the output channels In that mode.

Gain setting:
You can change the gain to high by pressing the volume knob and turning it clockwise by 2 steps in 1.5 seconds while the knob is pressed. To change the gain to low, press the volume knob and turn it counterclockwise by 2 steps. Pressing the knob for 1.5 seconds without turning switches the output mode. Alternatively, the gain can be changed by pressing the HGAIN” on the remote.

Setup Menu

Enter the setup menu:
Switch the power switch on the rear panel to power for, after the dot in the lower right corner of the screen disappears completely, press and hold the knob on the front panel while switching to “power on” and do not release the k.nob until entering the setup menu.

Change and save settings:

1. The knob on the front panel: press the knob to enter the next setting item. rotate the knob to set different parameters. Press and hold the knob until 8-8 is displayed on the screen to save the settings.
2. The remote control: press the volume up/down button to enter the previous/next setting item, and press the left/right button to set different parameters. Press the middle button and L70 displays 8-8 indicating that the settings have been saved.

Setting descriptions:
Screen brightness setting (Available, remote optional setting)

Headphone amp and pre-amp gain setting (Available for remote control setting)

Line Out mode setting (Available for remote control setting)

Headphone amp output channel setting

Line out output channel setting

Safe volume mode setting

Note:
When switching input/output channels or powering on, if the memorized volume is higher than the safe volume, the volume will be automatically adjusted to the safe volume value. If the memorized volume value needs to be restored, please press the middle button on the remote control/the knob on the front panel within 10s.

Safe volume setting

Remote control setting

Factory reset:
In the standby state, turn the knob on the front panel counterclockwise until all the indicators light up, and the factory settings can be restored.

Precautions

1. The output jacks shall not be grounded or short-circuited.
2. Do not keep the unit in a hot, humid environment or hit the unit strongly.
3. Opening the case instantly voids the warranty!
4. Indoor use only.
5. Topping accepts no liability for any loss or damage arising directly or indirectly from the failure of L70.
6. For improvement purposes, specifications are subject to changes without prior notice.

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