What is the RDL TX-J3?
The RDL TX-J3 is a passive input module that mixes two unbalanced line-level sources into a balanced mono output. It brings consumer-format audio from dual RCA jacks or a mini-jack into a professional balanced system.
How does it work?

The TX-J3 front panel features two gold-plated RCA jacks and a mini-jack input for mono or stereo consumer-level sources; plugging in the mini-jack disables the RCA inputs. Inputs 1 and 2 are combined and balanced through audio transformers configured to reject induced hum. The output is on a detachable terminal block (+, -, ground) for connection to inputs of 10 kΩ or higher, with response of 30 Hz to 20 kHz (±1 dB). Because it is passive and adds no gain, its balanced output is not a standard +4 dBu level. It mounts with RDL TX-series hardware such as the RDL TX-RA5 rack adapter, the RDL TX-RRB1 rear rail kit or the RDL DRA-35T DIN rail adapter.
What are the key features?
- Dual RCA and Mini-Jack Inputs — Gold-plated RCA jacks and a mini-jack accept mono or stereo consumer sources.
- Stereo to Mono Summing — Two unbalanced signals are combined into one balanced mono output.
- Hum Rejection — Audio transformers are configured to reject induced hum on unbalanced lines.
- Passive Design — The module requires no power and converts unbalanced to balanced without gain.
- Detachable Output Terminal Block — The balanced output connects to 10 kΩ or higher inputs on a detachable terminal block.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
Nationwide Audiovisual Services, Design, Installation & Support
Creation Networks is a trusted nationwide partner for complete audiovisual solutions — delivering expert AV system sales, professional design, programming, installation, and ongoing support to organizations across the United States.
From Microsoft Teams Rooms and enterprise video conferencing to LED video walls, live streaming production, and hybrid collaboration systems, we provide end-to-end AV integration using premium, certified technology from industry leaders including Crestron, Q-SYS, Shure, Extron, and Absen.
Whether you operate a single location or manage facilities nationwide, Creation Networks ensures your AV systems are designed for reliability, scalability, security, and long-term performance — helping your organization communicate more effectively and operate at peak efficiency.
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