Inputs

Input connections

Input Channels

All input and output connectors are located on the rear panel of the console.

The quality of connections between different sources and the console ensures reliable and fault-free operation. Take the necessary time to make connections carefully, always using high-quality materials.

Microphone Inputs

The microphone channels are electronically balanced and use standard XLR connectors.

• Each channel features two XLR connectors, internally summed.
• When using two microphones on the same channel, they should be the same brand and model, preferably dynamic.
• Voice level differences are compensated by the console’s internal compressors.

The 48V switch, located on the front panel, activates 48V phantom power on all inputs.

Dynamic microphones can receive phantom power without risk of damage, as their moving coil has a floating connection that decouples the voltage.

Line Inputs

Each line channel has two stereo inputs, selectable from the console’s front panel:

• Channels 3 and 4: unbalanced inputs on RCA connectors (LIN-1 and LIN-2) and balanced inputs on a DIN-5 connector (BAL-1 and BAL-2).
• Channel 5: digital. It’s a USB port for direct computer connection. Accepts an unbalanced auxiliary input (RCA).

In equipment with /AoIP option, the LIN-2 auxiliary input is internally assigned to the streaming module and cannot be used for other signals.

To connect equipment with balanced output, a DIN-5 to dual female XLR or 1/4” TRS stereo connector cable must be assembled, as appropriate.

DIN-5 to XLR Pin Assignment

DIN-5 (balanced stereo)	XLR Female
Pin 1 → Audio (-) Right	Pin 1 → Ground (shield)
Pin 2 → Audio (+) Right	Pin 2 → Audio (+)
Pin 3 → Audio (-) Left	Pin 3 → Audio (-)
Pin 4 → Audio (+) Right
Pin 5 → Audio (+) Left

• The unbalanced RCA inputs accept equipment with -10 dBV output over 10 kΩ (consumer equipment).
• The gain control is common to both inputs and always acts on the selected input.

Digital USB Input

Channel 5 directly connects the console to a computer via USB port (standard USB A/B cable).

• Compatible with 1.1, 2.0, and 3.0 ports.
• Recommended cable length 2-3 m; do not exceed 4 m even with extensions.
• Compatible with Windows® 7/10, Linux, and macOS.
• Drivers are installed automatically; no additional drivers required.

Before connecting the console to the PC via USB, verify that the computer has effective ground connection through the brass terminal on the rear panel.

• Use a multimeter set to 25 VAC between PC and console chassis; reading should be 0 V.
• Without proper grounding, the USB input of the console or PC could be damaged.

When connecting the powered console, Windows® detects a “USB playback device” and a “USB recording device”. On the console, the Digital IN/Out indicator will show U4, confirming that stereo input and output were recognized.

In Windows®, this can be verified in: Control Panel → Sound and Audio Devices, where default playback and recording devices are defined.

In software applications, select the USB playback and recording devices.

If the PC has no other audio interface, Windows® will use USB-1 devices as default (Channel 5 input and PGM/REC output of the D612).

Channel 5 also features an auxiliary stereo unbalanced input with RCA connectors for conventional equipment.