Product OverviewThe RDL TX-J2 is a passive unbalanced to balanced audio converter designed for fixed commercial AV installations where consumer-level source equipment must feed a professional audio system. The TX-J2 sums two unbalanced RCA inputs to a single balanced mono output, making it a practical signal-level interface adapter for AV distribution systems in restaurants, retail environments, and clubs. Because it requires no power supply, it simplifies rack design and eliminates a potential point of failure in permanent installations. Integrators specifying an RCA to balanced line conversion solution will find the TX-J2 an efficient, low-cost option for bridging consumer and professional signal domains.Product DescriptionThe RDL TX-J2 unbalanced to balanced audio converter uses a transformer-based passive design to accept two unbalanced RCA coaxial inputs and deliver a combined balanced mono output via a detachable terminal block. The output connector provides separate positive, negative, and ground terminals, allowing straightforward integration with professional mixing consoles, amplifier inputs, and commercial DSP platforms. The transformer isolation built into the TX-J2 provides hum cancellation on both inputs, addressing the ground loop issues that commonly arise when consumer electronics share a ground path with professional rack-mounted equipment. Because the unit introduces no gain stage, it contributes minimal noise to the signal chain — important in distributed audio systems where multiple input sources are being summed before amplification. The frequency response of 30 Hz to 20 kHz covers the full audible range without bandwidth limiting, making it suitable for music playback, background audio, and paging integration scenarios. The compact metal enclosure is sized for shelf, rack accessory bay, or surface mounting, and the gold-plated RCA jacks resist oxidation in long-term fixed installations. For AV system designers needing a reliable passive RCA to balanced XLR-equivalent interface, the TX-J2 delivers consistent performance without adding complexity to the signal path.Key Features Passive Design — Requires no external power supply, eliminating power wiring requirements and improving system reliability in permanent installations. Dual RCA Inputs Summed to Balanced Mono Output — Accepts two unbalanced RCA sources and combines them to a single balanced line-level output, reducing input count requirements on the destination device. Transformer Isolation with Hum Cancellation — Built-in transformer isolation breaks ground loops between consumer and professional equipment, eliminating the hum that commonly affects mixed-signal installations. Gold-Plated RCA Input Jacks — Corrosion-resistant contacts maintain connection integrity over years of continuous use in fixed installations. Detachable Terminal Block Output — The balanced output connector (positive, negative, ground) is detachable for easier field wiring and termination. No Gain Stage — Passive signal path keeps noise contribution to a minimum, preserving audio fidelity through the conversion. Full-Range Frequency Response — 30 Hz to 20 kHz bandwidth accommodates all program material types without coloring the signal. Compact Enclosure — Small form factor fits standard AV rack shelves, surface mounting, or concealed installation behind equipment. Technical Specifications Specification Value Input Configuration Two unbalanced RCA coaxial jacks Output Configuration One balanced mono via detachable terminal block (positive, negative, ground) Signal Path Passive (no power required) Hum Cancellation Yes, transformer isolation on inputs Gain None (passive conversion) Frequency Response 30 Hz – 20 kHz Input Connector Gold-plated RCA (x2) Output Connector Detachable screw terminal block Power Requirement None
