User Manual

Table Of Contents

ENGLISH OPERATION MANUAL

JB SYSTEMS

3/3 USB AUDIO INTERFACE

knob to optimize the sensitivity of the incoming line/phono signal, refer to the indicators (2) for the

optimal setting. To be able to see the input level of the [LINE IN] input, you have to select this input by

turning the [MIX] knob (5) totally to the left

5. [MIX] button: this button can be used to mix the incoming signals that will be sent to the monitor outputs

(= the headphones output (7) and the LINE OUT (8) output).

• When you turn the knob 100% to the left, only the analog sound source of [LINE IN] (9) can

be heard.

• When you turn the knob 100% to the right, only the sound of your computer that is

connected to the USB input (10) can be heard.

• When you turn the knob to the center position, both input sources (8) & (10) can be heard

6. [MONITOR LEVEL]: controls the general output level of the headphones output (7) and the [LINE OUT]

output (8)

7. Headphones output: you can connect your headphones here.

IMPORTANT: always turn the [MONITOR LEVEL] button (6) down before plugging in any headphones.

FUNCTIONS (rear)

8. [LINE OUT] connectors: used to connect active speakers or an amplifier. The output level can be set

with the [MONITOR LEVEL] button (6) on the front of the unit.

9. [LINE IN] connectors: used to connect an analog audio device (CD player, phono, etc.)

10. USB connector: used to connect your unit to a computer. This connector is bi-directional. You can send

sound to your computer for recording purposes and/or send music from your computer through the unit

to the [LINE OUT] (8) and headphones output (7).

Note: when the unit is connected to a computer, the unit will be powered automatically via this USB

cable. You don’t have to use the external power adapter.

11. Power input: The supplied power adapter should only be used when the unit is NOT connected to

a computer. (when the unit is connected to a computer, the unit will be powered automatically via the

USB cable). The Power adapter should only be used when the unit is only used as a pre-amp for an

analog device when no computer is connected.

12. GROUND CONNECTION: use this screw only to connect the eventual earth wire from a turntable. This

will eliminate eventual humming noises.

SPECIFICATIONS

This unit is radio-interference suppressed. This appliance meets the requirements of the current European

and national guidelines. Conformity has been established and the relevant statements and documents have

been deposited by the manufacturer.

Power Supply: 9V AC @ 150mA or USB bus powered

Frequency response: 10Hz-20.000Hz (+/-5dB)

THD: <0.01% @ 1kHz

Hum & Noise: >89dB below clipping

Maximum Input Level: 40mVrms @1KHz (phono), +19dBu (line)

A/D & D/A: 16 bit, 44.1KHz or 48KHz

Dimensions: 113(W) x 40(H) x 73(D) mm

Every information is subject to change without prior notice

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