4.INSTALLATION & CONNECTION
4.1Mains Connection
This is a dual voltage unit. Please ensure that the 
LTO HPA6 6-Channel Headphone Amplifier is set to the correct supply voltage before plugging the power cord into the wall outlet, use the same fuse as marked on the fuse holder at the AC power connection socket.
Do not insert power cord into the unit until voltage has been correctly set. Do not plug the power cord into AC power until voltage has been correctly set.
The mains connection of the 
LTO HPA6 6-Channel Headphone Amplifier is made by using the enclosed mains cord and a standard IEC receptacle. It meets all of the international safety certification requirements.
4.2Audio connection
The HPA6 6-Channel Headphone Amplifier presents with balanced XLR connectors and 1/4" TRS phone jack and it can be interfaced by several ways to support a variety of applications without any signal loss.
a.Wiring Configuration
Either the 1/4" TRS (Tip-Ring-Sleeve) phone jack or the XLR servo connector can be wired in balanced and unbalanced modes, which will be determined by the actual application status. Please wire your systems as the following examples:
For 1/4" Phone jack
+ | | + | | + |
| | - | | |
Tip | Ring | Tip | Ring | Tip |
| |
Sleeve | | Sleeve | | Sleeve |
TS Type Unbalanced | TRS Type Balanced | TRS Type Unbalanced |
|
For XLR connector
Pin2 (+) | | Pin2 (+) |
| Pin3 (-) |
Pin3 (-) | |
| |
(Linked to Pin1 manually, | ) | |
Pin1 ( ) | | Pin1 ( ) |
| |
XLR Type Unbalanced | | XLR Type Balanced |
b. In Line Connection
For these applications, the HPA6 6-Channel Headphone Amplifier provides XLR connectors and 1/4" TRS phone jack to easily interface with most professional audio devices. Follow the configuration examples below for your particular connection.