Radio Design Labs TX-A2
1-Channel Balanced to Unbalanced Audio Converter/Transformer


Radio Design Labs' TX-A2 is the ideal choice in installations requiring passive isolation and level attenuation between a professional balanced line-level mono source and consumer equipment unbalanced inputs.

The TX-A2 is a complete unbalanced line-level audio output module.  The front panel provides a detachable terminal block for connection of a balanced +4 dBu audio source.  The input signal is coupled to two front-panel gold plated RCA jacks through a studio-quality isolation transformer.  Each output is coupled through an attenuation network that produces a nominal -10 dBV level.  Both output jacks may be used to feed two mono equipment inputs or one stereo input.  A single output jack may be used for mono. Shielding is provided by the TX-A2's heavy duty aluminum enclosure.

Wherever professional format audio signals need to be converted to an unbalanced line level, the TX-A2 and TX-A2D are an ideal choice.  Use them individually or in conjunction with other RDL products as part of a complete audio/video system.


  • Unbalanced Audio Outputs from a Balanced Line
  • Balanced to Unbalanced Conversion
  • Mono Input to Stereo Output
  • +4 dBu Input Level to -10 dBV Output Level
  • Studio-Quality Transformer Isolation
  • Passive Converter with Output Jacks


  • Input connector 1: Detachable terminal block
  • Input level: +4 dBu nominal; +22 dBu max
  • Output connectors (2): Gold-plated phono jacks
  • Output level: -10 dBV nominal
  • Frequency response (line level): 20 Hz to 20 kHz (±0.5 dB)
  • Total Harmonic Distortion: <0.05% (20 Hz to 20 kHz, +4 dBu input); <0.01% (1 kHz)
  • Dimensions: 2.4" H x 3" L x 1.6" W (6.1 x 7.6 x 4.04 cm)
Add to Cart

We're sorry, only of this item available

Call a Sales Pro at for more information

Serving Contractors, Dealers, and Installers Since 1977

Contact: 1-800-828-0509 / Hours: Mon - Fri 7:00AM - 7:00PM