User Manual

ENGLISH OPERATION MANUAL
JB SYSTEMS
®
2/3 USB AUDIO INTERFACE
• Keep the unit away from children.
• Maximum safe ambient temperature is 40°C. Don’t use this unit at higher ambient temperatures.
• Minimum distances around the apparatus for sufficient ventilation is 5cm.
• Always unplug the unit when it is not used for a longer time or before you start servicing.
• Check that the available voltage is not higher than the one stated on the power supply.
• The socket inlet shall remain operable for disconnection from the mains.
• The power cord should always be in perfect condition. Switch the unit immediately off when the power cord
is squashed or damaged.
• Never let the power-cord come into contact with other cables!
• In order to avoid a hazard, the unit shall only be used with the AC-adaptor delivered with it. If the AC-
adaptor is damaged, a same model adaptor shall be used only.
• When the power switch is in OFF position, this unit is not completely disconnected from the mains!
• In order to prevent electric shock, do not open the cover.
• In the event of serious operating problems, stop using the appliance and contact your dealer immediately.
• Due to safety reasons it is prohibited to make unauthorized modifications to the unit.
INSTALLATION GUIDELINES:
• Install the unit in a well-ventilated location where it will not be exposed to high temperatures or humidity.
• Placing and using the unit for long periods near heat-generating sources such as amplifiers, spotlights, etc.
will affect its performance and may even damage the unit.
• When installed in a booth or flight case, please make sure to have good ventilation to improve heat
evacuation of the unit.
• To avoid condensation to be formed inside, allow the unit to adapt to the surrounding temperatures when
bringing it into a warm room after transport. Condense sometimes prevents the unit from working at full
performance.
CLEANING THE APPLIANCE:
Clean by wiping with a polished cloth slightly dipped with water. Avoid getting water inside the unit. Do not
use volatile liquids such as benzene or thinner which will damage the unit.
FUNCTIONS (FRONT)
1. [POWER] switch: Switches the unit on and off. Make sure you switch the unit off when not in use.
2. Signal input indicators: select the input you want to monitor by using the [MIX] knob (5).
Turn it to the left to check the analog [LINE IN] signal. (the level can be modified with the [INPUT GAIN]
knob (4)
Turn it to the right to check the [USB] signal coming from the computer. This level can be modified in the
computer
• [SIGNAL]: shows if an input signal is detected
• [CLIP]: When the line input is too high (input overload) this indicator turns red. In this case
use the [INPUT GAIN] knob (4) to lower the input signal level
3. [INPUT] switch: used to adapt the [LINE IN] audio input (9) to the audio source that is connected:
• [LINE] position: you can connect any line level audio source to record it on your computer or to
monitor is when you use the unit only as a pre-amp.
• [PHONO] position: use this position if you connect a turntable that has no LINE output (internal
RIAA amplifier is activated) If possible, please also use the ground connection.
4. [INPUT GAIN]: line signals coming from different equipment can differ a lot. Most CD-players have 2V
output while the output from a tuner or cassette deck is often not more than 350mV. You can use this