The RDL D-CIJ3 is a passive audio interface designed to combine two unbalanced stereo audio sources into a single mono line-level output. It provides transformer-isolated conversion from consumer-level stereo audio to a balanced or unbalanced mono signal, making it useful for connecting computers, media players, and other consumer audio sources to professional sound systems.
Because the D-CIJ3 is passive and requires no power supply, it provides a simple installation solution when you need to combine stereo audio and reduce the possibility of ground-loop hum.
Stereo-to-Mono Audio Conversion
The D-CIJ3 accepts unbalanced stereo audio through RCA phono inputs or a stereo mini-jack and combines the left and right channels into a single mono output.
The output is provided on a rear-panel detachable terminal block and can connect to equipment with a balanced or unbalanced line-level input.
This makes the D-CIJ3 useful when a stereo consumer source needs to feed a single mono input on an amplifier, mixer, DSP, or other professional audio equipment.
Transformer Isolation Helps Reduce Hum
The D-CIJ3 uses transformer-isolated inputs to help prevent unwanted hum and noise caused by ground-loop conditions. This can be particularly useful when connecting consumer equipment to professional commercial audio systems.
The passive circuit provides the conversion without adding gain, making it a straightforward interface between different types of audio equipment.
Simple Installation With No Power Required
Unlike an active audio interface, the RDL D-CIJ3 does not require an external power supply. This simplifies installation and eliminates another piece of equipment that would otherwise need to be mounted and powered.
The compact construction is suitable for both permanent installations and portable audio systems.
RDL D-CIJ3 Key Features
-
Passive stereo-to-mono audio interface
-
Combines two unbalanced stereo channels into one mono output
-
Transformer-isolated inputs for hum rejection
-
RCA phono and stereo mini-jack inputs
-
Balanced or unbalanced mono line-level output
-
Rear-panel detachable terminal block
-
No external power supply required
-
No gain added to the audio signal
-
Compatible with equipment having 10 kΩ or higher input impedance
-
Compact design for fixed or portable installations
-
Available as the D-CIJ3 or stainless-steel DS-CIJ3
Applications
The RDL D-CIJ3 can be used anywhere a consumer stereo source needs to be connected to a professional mono audio system, including:
-
Conference rooms
-
Classrooms
-
Commercial sound systems
-
Retail stores
-
Professional AV installations
-
Background music systems
-
Amplifier and mixer inputs
-
Studio and recording applications
-
Computer and media-player audio connections
Why Choose the RDL D-CIJ3?
The D-CIJ3 solves a common installation problem: connecting an unbalanced stereo source to a single mono professional audio input while providing transformer isolation.
Its passive design, compact size, and lack of a required power supply make it a practical choice when you need a simple stereo-to-mono interface without adding an active converter or additional electronics.
Why Buy from Audio Supply?
Audio Supply can help you determine whether the RDL D-CIJ3 is the right interface for your audio system and help you select compatible RDL modules, amplifiers, mixers, and other installation equipment.
