Hosa GPP-359 — Dual 1/4 in TRS to 1/4 in TRS Stereo Signal Splitter Adapter
GPP-359 Overview
The Hosa GPP-359 is a passive signal splitter adapter designed to duplicate a stereo signal from a single source to two outputs. Built around a dual 1/4 in TRS connector configuration, it allows one headphone output to drive two sets of headphones without additional hardware. This makes it a practical solution for tracking sessions, broadcast monitoring, and any application where two listeners need simultaneous access to the same stereo feed. Audio engineers, studio technicians, and broadcast operators will find it a reliable, no-frills tool for everyday signal routing needs.
Its compact, inline form factor requires no power and introduces no additional signal processing, keeping the signal path clean and the workflow uninterrupted.
Key Features
- Stereo Signal Duplication — Splits a single stereo source to two outputs, allowing two headphones to monitor the same feed simultaneously
- Dual 1/4 in TRS Connectors — Balanced TRS connections on both outputs ensure compatibility with standard professional and consumer headphone outputs
- Passive Design — Requires no power source, making it immediately deployable in any environment without additional infrastructure
- Compact Inline Form Factor — Minimal footprint keeps cable runs clean and uncluttered at the source device
- Broad Application Compatibility — Suited for studio headphone amplifiers, audio interfaces, mixers, and any device with a standard 1/4 in TRS headphone output
Connectivity & I/O
- Dual 1/4 in TRS female connectors (output) to 1/4 in TRS male connector (input)

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