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The ultra-compact TX series can be mounted in limited space using the adhesive methods popularized by RDLÂs STICK-ONÂ® Series. The TX-J2 may be mounted directly to a backboard or chassis using a variety of mounting options available from Radio Design Labs.The TX-J2 is the ideal choice in installations requiring the passive mixing of two unbalanced line-level audio sources to feed a balanced (or unbalanced) audio output. The TX-J2 is a complete unbalanced line-level audio input module. The front panel features two gold plated phono jacks, intended for mono or stereo consumer level sources. Inputs 1 and 2 are combined and balanced through audio transformers configured to reject induced hum. The line-level output is provided on the front-panel barrier block for connection to 10 kOhm or higher input impedance line-level module or equipment inputs.Note: The TX-J2 is a passive module that does not add gain to the consumer level input. Therefore the balanced output level from the module is not a standard +4 dBu. For installations where a +4 dBu balanced line-level is required, or if the input level is particularly low, RDLÂs TX-LC2 is recommended.Features:Mix two unbalanced audio signals to mono balancedCombine stereo into mono with balanced outputUnbalanced to balanced conversion without gainHum cancellation on unbalanced line inputsFrequency response: 30 Hz to 20 kHz (+/- 1 dB)