Unbal. to Bal. Audio Transformer-Phono, XLR

The RDL TX-AFC1M is a connectorized audio-format converter built around a studio-quality bifilar audio transformer. It is designed for a specific signal-path requirement: converting an unbalanced audio connection to a balanced connection while providing galvanic isolation. The unit combines phono and XLR connectivity with unity gain and gold contacts at both the input and output. Its compact dimensions are 3.17 inches wide, 1.76 inches high, and 2.06 inches deep.

Ideal Use Cases

The TX-AFC1M is suited to studio audio systems that need to connect unbalanced and balanced equipment. Its defined conversion format makes it appropriate when a phono connection must be integrated with an XLR-based signal path. The transformer also addresses applications in which galvanic isolation is a stated system requirement rather than an optional processing feature.

• Unbalanced-to-balanced audio format conversion
• Phono and XLR equipment integration
• Studio signal paths requiring galvanic isolation
• Unity-gain conversion points
• Installations operating between 0°C and 55°C

Why Choose This Model

The central advantage of the TX-AFC1M is the combination of format conversion and transformer isolation in one connectorized RDL TX unit. The studio-quality bifilar transformer provides the foundation for the conversion, while galvanic isolation separates the connected sides of the audio path. Unity gain establishes a direct gain relationship through the converter: the product is specified for conversion without an increase or reduction in gain. Gold contacts are used on both the input and output, giving buyers a clearly identified contact specification at each connection point.

Installation and Integration

Before installation, confirm that the system requires unbalanced-to-balanced conversion and that its connector formats correspond to the TX-AFC1M’s phono and XLR connections. The enclosure requires a space measuring 3.17 by 1.76 by 2.06 inches, equivalent to approximately 8.05 by 4.47 by 5.23 centimeters. The listed ambient operating environment is 0°C to 55°C, so placement should remain within that range.

The unit is supplied in a cardboard box with listed package dimensions of 2 by 2 by 4 inches and a shipping weight of 0.62 pounds. A PDF specification sheet is available from RDL for system documentation. Engineering functional-block CAD information and an American DXF front-panel diagram are also identified in the supplied product data.

Performance Highlights

The performance profile is centered on four documented characteristics: a studio-quality bifilar audio transformer, galvanic isolation, unbalanced-to-balanced conversion, and unity gain. Together, these specifications define the unit’s role precisely. It changes the audio connection format from unbalanced to balanced while maintaining the stated unity-gain relationship. The galvanic isolation is part of the transformer-based design, and the gold contacts apply to both sides of the connection. These are fixed, product-specific attributes rather than selectable modes or processing options.

What Makes It Different

The TX-AFC1M brings several related requirements together in a compact, connectorized format. Buyers do not have to evaluate the transformer, connector format, gain relationship, and isolation method as unrelated specifications: this model is explicitly described with all four. The phono and XLR connections identify its integration format, while the unbalanced-to-balanced designation identifies its conversion direction. Its unity-gain specification further distinguishes the conversion role from products intended to provide signal amplification. The result is a focused RDL TX model with a clearly defined position in an audio system.

Final Assessment

The RDL TX-AFC1M is a strong match for a project that specifically calls for studio-quality transformer-based unbalanced-to-balanced conversion, phono and XLR connectivity, galvanic isolation, and unity gain. Gold input and output contacts, compact physical dimensions, and a documented 0°C to 55°C operating range complete the available specification set. For systems whose requirements align with those details, the TX-AFC1M offers a purpose-defined connectorized conversion component without introducing an unspecified gain change.