The Comprehensive Cables MP/2MJ-C is a short, passive audio adapter cable designed to split a single 3.5mm mini plug stereo audio output into two separate 3.5mm mini jack stereo inputs. This Y-cable serves as a simple yet effective solution for routing an audio signal from one source to two different destinations simultaneously. A common application is connecting a portable media player, laptop, or smartphone headphone output to two separate pairs of headphones, allowing two people to listen privately to the same audio source. It can also be used to feed a stereo signal into two different recording or amplification devices that each require a standard 3.5mm input.

Constructed with standard copper conductors and molded plastic connectors, the cable is built for basic, low-voltage audio signal transfer. The 6-inch length makes it ideal for tight spaces and desktop use, minimizing cable clutter. As a passive adapter, it requires no external power and introduces negligible signal loss for consumer-level audio applications. It is important to note that using this cable to split an output to two inputs will result in an impedance mismatch, which can slightly lower the overall volume and potentially affect audio quality, but for casual listening or non-critical monitoring, it provides a functional and convenient connection.

This type of adapter cable is a staple in basic AV kits, educational settings, and personal electronics setups due to its simplicity and utility. While not suitable for professional studio patching or long-distance runs, the Comprehensive Cables MP/2MJ-C effectively solves common connectivity problems where a single audio source needs to be shared between two listeners or devices with minimal setup and cost.