DB-CIJ3

RDL DB-CIJ3 - Stereo-to-Mono Audio Input Module with Transformer Isolation

RDL DB-CIJ3 is a professional passive audio input module designed for mixing unbalanced stereo line-level signals into a mono balanced or unbalanced output. It is ideal for AV installations requiring reliable integration of consumer audio sources into professional systems.

The front panel features two gold-plated RCA jacks (left/right) and one stereo 3.5 mm mini-jack. Input signals are summed to mono and converted through audio transformers, providing galvanic isolation and effective hum rejection. The mono line-level output is available on a rear-panel detachable terminal block and is suitable for equipment with an input impedance of 10 kΩ or higher.

With its compact form factor and passive operation, the DB-CIJ3 is a practical solution for conference rooms, sound systems, and multimedia installations.

Functionality

• Passive stereo-to-mono signal mixing
• Unbalanced-to-balanced line-level conversion
• Transformer isolation for hum and noise rejection
• Supports consumer audio sources (RCA, mini-jack)
• No power required

Features

• Device type: passive audio input module
• Inputs: 2 x RCA (L/R), 1 x stereo 3.5 mm mini-jack
• Output: mono balanced or unbalanced (terminal block)
• Isolation: audio transformers
• Signal type: unbalanced line-level
• Output impedance: suitable for ≥10 kΩ inputs
• Mounting: panel-mount (wall or desktop)

RDL DB-CIJ3 provides a reliable and compact solution for integrating consumer audio sources into professional AV systems, ensuring clean signal conversion and immunity to interference.