Audio cable Unitek C19027BK01 — 2× RCA (CINCH) to 3.5 mm TRS jack, 25 m

Unitek C19027BK01 is a 25-meter audio cable that converts dual RCA (CINCH) outputs to a single 3.5 mm TRS jack. It is intended for transmitting stereo line-level signals over a long run, enabling connection of phones, laptops, portable players and other 3.5 mm TRS sources to amplifiers, active speakers, mixers or AV equipment with RCA inputs. The cable's length and connector combination make it suitable for installations where a single, extended analog connection is required without additional adapters.

Advantages

The cable provides a straightforward wired connection between a 3.5 mm TRS stereo output and devices with two RCA inputs, maintaining separate left and right channels across the run. With a 25 m length it reduces the need for multiple shorter cables or repeated couplers and supports tidy routing in home AV setups, studios, classrooms or presentation environments. Durable molded connectors simplify insertion and removal while the single-run design minimizes potential signal interruptions caused by multiple joints.

Suitable for

• Connecting smartphones, laptops or portable players with a 3.5 mm jack to amplifiers or speakers with RCA inputs
• Home audio systems where a long analog run is required
• Studio patching and rehearsal spaces for line-level stereo routing
• AV presentations and conference rooms needing a stable wired source

When it may not be suitable

This cable is designed for unbalanced line-level stereo signals and is not suitable for microphone-level signals without appropriate preamplification. It does not provide digital audio transmission or balanced audio; for long runs in electrically noisy environments, a balanced connection or a line transformer may be preferable. The 3.5 mm TRS termination expects a stereo output — it will not carry discrete multichannel formats or microphone bias.

Key specifications

• Connector types: dual RCA (CINCH) to 3.5 mm TRS stereo jack
• Length: 25 meters
• Signal type: analog stereo, unbalanced line-level
• Usage: designed for line-level audio connections between 3.5 mm sources and RCA inputs

How to use

Connect the 3.5 mm TRS plug to the headphone or line output of your source device, then connect the two RCA plugs to the left and right RCA inputs on the target amplifier, speaker or mixer. Ensure the source output level is set to line-level where available, and verify left/right channel orientation when plugging in the RCA connectors. Route the cable away from power cables and strong EMI sources to reduce hum or interference. For best results, secure the cable along its run to prevent strain on the connectors.

What to consider before purchase

• Confirm that your source uses a 3.5 mm TRS stereo output and the destination accepts two RCA inputs
• Assess whether an unbalanced analog cable meets your noise and distance requirements for the installation
• Plan cable routing to avoid electromagnetic interference and physical damage over the 25 m length

Usage recommendations

Use this cable for straightforward stereo line-level connections in controlled environments—home audio, small studios or presentation setups. For installations with high electrical noise or longer distances, consider balanced connections or DI boxes to preserve signal integrity.