Hosa GMP-112 — 1/4 in TRS to 3.5mm TRS Stereo Adapter
GMP-112 Overview
The Hosa GMP-112 is a compact stereo adapter designed to convert a 1/4 in TRS stereo phone plug to a 3.5mm TRS mini stereo phone jack, providing a straightforward solution for interfacing headphones and stereo audio devices across different connector formats. It is well-suited for audio engineers, studio technicians, and touring professionals who regularly work across equipment with mixed headphone output standards. The GMP-112 is an ideal headphone adapter for connecting consumer or prosumer headphones to professional gear, or vice versa.
Its compact form factor keeps signal paths clean and uncluttered, making it a practical addition to any cable kit or patch bay toolkit.
Key Features
- 1/4 in TRS to 3.5mm TRS Conversion — Adapts a standard stereo phone plug to a mini stereo phone jack for cross-format compatibility
- Stereo Signal Integrity — TRS-to-TRS wiring preserves full stereo signal on both sides of the connection
- Headphone Adapter Application — Designed specifically for headphone use, bridging professional and consumer connector formats
- Compact Form Factor — Minimal footprint for easy integration into any kit, rack, or portable setup
- Hosa Build Quality — Constructed to Hosa’s standard for reliable, consistent performance in professional environments
Connectivity & I/O
- 1/4 in TRS stereo phone plug (male)
- 3.5mm TRS mini stereo phone jack (female)

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