Stewart Audio ADPT-SUMRCA Stereo Female RCA to Mono Euroblock Adapter

Connect Stereo RCA Audio to Pro Systems with the Stewart Audio ADPT-SUMRCA
The Stewart Audio ADPT-SUMRCA is a stereo female RCA to mono male Euroblock adapter that converts stereo line-level signals into a summed mono output for integration into commercial AV systems. This adapter is designed for installers who need to connect consumer audio equipment—such as CD players, media players, or streaming devices—into professional-grade hardware that relies on Euroblock inputs. It delivers a simple and reliable way to interface stereo RCA output with a balanced mono input.

Stereo Summing for Compatibility with Mono Audio Infrastructure
Many professional amplifiers and DSP units operate with mono balanced inputs, and connecting stereo signals without proper summing can lead to phase cancellation or uneven signal levels. The ADPT-SUMRCA solves this problem by passively summing the left and right stereo channels into a single mono feed. This ensures that the full audio content is preserved and properly routed through commercial-grade audio gear.

Designed for Integration in Installed AV Systems
This adapter is a must-have for AV installations in classrooms, conference rooms, hospitality venues, and houses of worship where stereo consumer devices are commonly used. The ADPT-SUMRCA allows you to plug in a stereo RCA source and route it cleanly into existing infrastructure that requires mono balanced inputs. This helps reduce signal mismatch issues and simplifies audio routing during permanent installations.

Passive Design Ensures Simple Setup and Dependable Operation
The adapter is fully passive, meaning it requires no external power and introduces no additional noise or complexity into the signal chain. Internal resistors manage the stereo summing process, preserving signal integrity while reducing the risk of ground loops or signal distortion. With no active electronics, the ADPT-SUMRCA is a plug-and-play solution built for reliability.

Compact and Installer-Friendly for Tight Rack Spaces
Its small form factor makes it ideal for space-constrained environments where clean cable management is essential. The male Euroblock end plugs directly into compatible hardware, reducing the need for custom wiring or bulky converters. It’s a practical, time-saving solution for AV technicians and integrators working across multi-room or distributed audio systems.

Ideal for Audio Routing in Professional AV Environments
From audio matrix systems to local source inputs, the ADPT-SUMRCA plays a key role in making consumer-grade sources compatible with commercial installations. It’s an efficient adapter that ensures stereo playback is accurately represented in mono systems, while maintaining audio fidelity and installation flexibility.