Hosa GRF-398 — Dual RCA to RCA Mono Distribution Adapter
GRF-398 Overview
The Hosa GRF-398 is a compact signal adapter designed to connect a stereo RCA cable to a single phono output. Its primary function is mono-to-stereo distribution, applying a mono signal equally to both the left and right channels of a stereo RCA pair. This makes it a practical solution for routing mono sources into stereo inputs without signal imbalance. Audio engineers, system integrators, and installers working with phono-terminated cabling will find this adapter useful for quick, reliable signal routing in fixed installations and live environments.
The GRF-398 eliminates the need for custom wiring or additional hardware when bridging mono outputs to stereo RCA inputs, streamlining signal chain setup and reducing cable clutter.
Key Features
- Mono-to-Stereo Distribution — Applies a mono signal equally to both left and right RCA outputs, ensuring consistent level across both channels
- Dual RCA to Single RCA Configuration — Adapts a stereo phono cable pair to a single phono output in one compact unit
- Phono Plug Compatibility — Designed specifically for use with standard RCA/phono-terminated cables and outputs
- Compact Form Factor — Inline adapter design minimizes footprint at the connection point, suitable for tight rack or panel environments
- Hosa Build Quality — Constructed to Hosa’s standard for professional-grade signal adapters used in touring, installation, and broadcast applications
Connectivity & I/O
- Dual RCA (phono) female connectors
- Single RCA (phono) male connector

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