RJ11 & Stereo Adaptor | Universal EC Fan Controller Compatibility Interface for Grow Room Ventilation

One Adaptor. Full EC Fan Compatibility Across RJ11 and Stereo Systems.

The RJ11 and Stereo Adaptor is a universal signal interface engineered by Global Air Supplies to bridge the compatibility gap between GAS climate controllers and EC inline fans, regardless of whether your fan uses an RJ11 or stereo jack input. Where the individual RJ11 and stereo adaptors each serve a single input type, this universal adaptor handles both, making it the most flexible option for growers who are unsure of their fan's input format, running mixed systems, or building a setup that may evolve over time.

Without the correct signal interface in place, your GAS controller cannot communicate with your EC fan. Fan speed modulation, temperature response, and environmental automation are all unavailable until the signal chain is complete. This adaptor closes that gap cleanly, with plug and play installation and stable signal transmission across the full operating range of your fan.

Key Benefits

• Dual Signal Compatibility. Supports both RJ11 and stereo jack EC fan inputs from a single adaptor, covering the two most common EC fan connection formats.
• Universal EC Fan Integration. Works across multiple fan input types, making it the most flexible adaptor option in the GAS accessory range.
• Broad GAS Controller Compatibility. Works with the full range of compatible GAS controllers including the Enviro, Enviro V2, EC5, Enviro 4, and EC2.
• Plug and Play Installation. Simple inline connection. No wiring, no tools, no configuration required.
• Stable Signal Conversion. Accurate, consistent fan speed response across the full operating range for smooth fan ramping and precise environmental control.
• Compact Design. Minimal footprint within your system. Sits cleanly between controller and fan without adding bulk.
• Essential System Component. Enables full controller-to-fan communication in setups where input format compatibility would otherwise prevent control.

How It Works

GAS controllers output a control signal to regulate EC fan speed. EC fans use either an RJ11 or stereo jack input to receive that signal. The RJ11 and Stereo Adaptor converts the GAS controller output to whichever format your fan requires, maintaining signal integrity and stability across the conversion. The fan receives accurate speed commands from the controller and responds correctly to temperature changes, speed adjustments, and environmental triggers. The result is a fully integrated ventilation system with no compatibility limitations between your controller and fan.

System Features

• Function. RJ11 and stereo jack signal conversion, universal EC fan compatibility.
• Compatible Controllers. GAS Enviro, GAS Enviro V2, GAS EC5, GAS Enviro 4, GAS EC2.
• Compatible Fans. EC fans with RJ11 or stereo jack inputs.
• Connection Type. Dual format: RJ11 and stereo jack output.
• Installation. Plug and play, inline connection.
• Signal Stability. Accurate fan modulation across full speed range.
• Manufacturer. GAS (Global Air Supplies).

Applications

• Universal EC Fan Controller Adaptor. The single adaptor solution for growers connecting GAS controllers to EC fans with either RJ11 or stereo jack inputs.
• Hydroponic Ventilation Control Interface. Completes the control chain between GAS environmental controllers and EC inline fans in automated grow room systems.
• Mixed System Compatibility. Ideal for setups running multiple EC fans with different input formats, or where the fan input type is not confirmed before purchase.
• Grow Room EC Fan Wiring Solution. Eliminates compatibility issues between controller outputs and EC fan inputs without custom wiring or modification.
• Fan Controller Signal Conversion. Suitable for any GAS controller and EC fan combination where direct connection is not possible without signal interface.

What Sets It Apart

The RJ11 and Stereo Adaptor is the most versatile option in the GAS adaptor range. If you know your fan uses an RJ11 input, the dedicated GAS to RJ11 Adaptor is the precise solution. If you know it uses a stereo jack, the GAS to Stereo Single Adapter is the direct match. But if you are working across multiple fans, building a system that may change, or simply want one adaptor that covers both formats without needing to confirm input type first, this universal adaptor removes the guesswork entirely. It is also the safest choice when purchasing an EC fan and controller together for the first time.

Complete Your GAS Ventilation Control System

This adaptor is one component in a complete EC fan control system. Here is the full GAS ecosystem it integrates with:

• GAS Enviro Fan Controller. Entry-level temperature-based fan speed control with simple dial interface. View the GAS Enviro Fan Controller.
• GAS Enviro V2 Fan Controller. Full environmental automation with humidity control, programmable sockets, fan balancing, and LCD display. View the GAS Enviro V2 Fan Controller.
• GAS EC5 Fan Controller. Purpose-built for EC fans with Reactive Temperature Technology, integrated fan balancing, and negative pressure control. No power pack required. View the GAS EC5 Fan Controller.
• GAS to RJ11 Adaptor. The dedicated interface for EC fans with RJ11 inputs specifically. View the GAS to RJ11 Adaptor.
• GAS to Stereo Single Adapter. The dedicated interface for EC fans with stereo jack inputs specifically. View the GAS to Stereo Single Adapter.

Technical Specifications

• Function. RJ11 and stereo jack signal conversion
• Input. GAS controller output
• Output. RJ11 and stereo jack (universal EC fan compatibility)
• Compatible Controllers. GAS Enviro, Enviro V2, EC5, Enviro 4, EC2
• Compatible Fans. EC fans with RJ11 or stereo jack inputs
• Installation. Plug and play, inline
• Manufacturer. GAS (Global Air Supplies)

Frequently Asked Questions

What fans is RJ11 & Stereo Adaptor compatible with?

RJ11 & Stereo Adaptor is designed to work with compatible inline fans. EC controllers require EC-motor fans for full variable-speed control — they are not compatible with standard AC-motor fans. AC fan controllers work with standard single-phase AC fans. Check the compatibility list for your specific fan model before purchasing RJ11 & Stereo Adaptor if you are retrofitting to an existing setup.

How does RJ11 & Stereo Adaptor automate my grow room climate?

RJ11 & Stereo Adaptor monitors temperature and/or humidity via its onboard or external probe and automatically adjusts fan speed to maintain your target setpoints. When temperature rises above your target, fan speed increases to extract warm air. When temperature drops, fan speed reduces to conserve heat. This removes the need for manual fan adjustments and keeps your grow room dialled in 24/7.

Can I use RJ11 & Stereo Adaptor with both my intake and exhaust fans?

Most fan controllers including RJ11 & Stereo Adaptor are designed to control your primary exhaust fan. Some models include dual-channel control for both intake and exhaust. Check the number of output channels and maximum load rating before connecting multiple fans — never exceed the controller's maximum amperage rating.

Does RJ11 & Stereo Adaptor ship fast within Australia?

Yes — RJ11 & Stereo Adaptor ships from our Australian warehouse with fast tracked delivery Australia-wide. Most east coast orders arrive within 2–5 business days. WA, NT, and TAS orders typically arrive within 5–12 business days.