Hosa GPM-103 3.5 mm TRS to 1/4 in TRS

The Hosa GPM-103 is a compact, passive adapter that bridges a mini stereo 3.5 mm plug to a 1/4" TRS stereo jack. Designed for quick headphone routing, it lets you listen on pro gear without the need for power or electronics—just plug in and go.

Who is this for?

Musicians, producers, students, and remote workers who frequently move between consumer headphones and equipment with 1/4" TRS inputs will appreciate its simplicity. It streamlines setups in studios, rehearsal spaces, classrooms, and on-the-go gigs by removing the need for bulky adapters or multiple cables.

How it works

Attach your 3.5 mm TRS-equipped device (like headphones or a portable player) to the 3.5 mm end, then connect the 1/4" TRS end to your mixer, audio interface, keyboard, or other gear with a stereo 1/4" input. The signal remains unaltered by circuitry—it's a direct, passive connection that preserves stereo channels.

Key features

• 3.5 mm TRS to 1/4" TRS adapter for seamless stereo compatibility between consumer devices and pro-era inputs.
• Passive design with no batteries or active electronics, reducing potential points of failure on stage or in the studio.
• Portable and lightweight ideal for wallets, pockets, or gig bags—always ready when you need to monitor or cue.

Use cases and scenarios

• Monitoring headphone audio from a portable player or laptop through a mixer or audio interface during practice sessions or remote recordings.
• Plugging consumer headphones into a keyboard, amplifier, or console with a 1/4" TRS input for quick listening or testing.
• Travel or on-site sessions where you need a simple, reliable bridge between small devices and professional inputs.

Compatibility and tips

Note that this adapter is intended for devices with stereo 1/4" TRS inputs. For mono or unbalanced setups, results may vary, so pair it with stereo-capable gear to ensure full left-right channel performance. To maximize reliability, avoid forcing connections—simply align the jacks and insert firmly until seated.

What you get

One GPM-103 3.5 mm TRS to 1/4" TRS adapter—an uncomplicated, dependable solution for everyday audio routing between consumer headphones and pro-level inputs.