TX-AFC1F

RDL TX-AFC1F – Balanced to Unbalanced Audio Transformer (XLR to RCA)

The RDL TX-AFC1F is a studio-quality audio transformer designed for professional AV installations, providing galvanic isolation and converting balanced audio signals to unbalanced consumer-level outputs. It is ideal for applications requiring transformer coupling between professional audio sources and consumer equipment.

The TX-AFC1F is a single-channel module featuring a female XLR input and a phono jack output. A bifilar transformer converts the input to unbalanced, with an integrated pad delivering –10 dBV output for a +4 dBu input. The XLR shield (pin 1) is connected to the RCA ground. The input bridges at 2.5 kΩ and is optimized to feed a 10 kΩ load.

With a frequency response of 20 Hz to 20 kHz (±0.1 dB), ultra-low distortion (<0.06% from 50 Hz to 20 kHz, typically 0.0015% at 1 kHz), and >85 dB CMRR, the TX-AFC1F delivers the clarity, headroom, and fidelity expected in studio environments.

Its compact design allows mounting in various locations, including rack sides and rails, using RDL mounting accessories. The connector layout supports high-density installations while maintaining accessibility.

Functionality

• Converts balanced XLR input to unbalanced RCA output
• Provides galvanic isolation between devices
• Matches professional to consumer audio levels
• Compact design for flexible mounting
• Ideal for studio and general-purpose installations

Features

• Device type: balanced to unbalanced audio transformer
• Input: XLR, +4 dBu (max +22 dBu), 2.5 kΩ bridging
• Output: RCA, -10 dBV
• Frequency response: 20 Hz – 20 kHz (±0.1 dB)
• THD: < 0.06% (50 Hz – 20 kHz), typ. 0.0015% (1 kHz)
• CMRR: > 85 dB (50–60 Hz)
• Connectors: gold-plated XLR (input), RCA (output)
• Mounting: flat surfaces, rack sides, front/rear rails
• Design: passive, compact

The RDL TX-AFC1F is a reliable solution for AV professionals needing high-quality signal conversion and isolation between professional and consumer audio systems.