Description
The TX-AT1 is a passive 1:1 audio isolation transformer designed to provide galvanic isolation for 600 ohm line-level signals. It isolates audio circuits to eliminate ground loops and reduce hum while preserving signal integrity. The compact unit is optimized for studio and broadcast line-level applications.
Key features include a studio-quality bifilar transformer winding and terminal-block connections for secure wiring. The transformer provides true 1:1 coupling to maintain level and phase while isolating grounds. It is engineered to drive 600 ohm lines reliably in professional audio environments.
Performance specifications include a measured frequency response of 20 Hz to 20 kHz with +/- 0.1 dB fidelity and very low distortion figures. THD is specified at less than 0.035% from 50 Hz to 20 kHz at a +4 dBu input, with a typical 0.001% reading at 1 kHz. Input/output nominal level is +4 dBu with a maximum handling of +22 dBu and a common-mode rejection ratio greater than 85 dB on balanced inputs at mains frequency.
Connectivity is handled via a terminal block that accepts balanced or unbalanced wiring, enabling straightforward integration into racks or patch panels. The transformer is compatible with standard +4 dBu professional line devices and can be used inline to isolate mixers, preamps, line drivers, and broadcast gear. Its passive design requires no power or active circuitry.
Typical applications include ground-loop mitigation between systems, isolation of long analog runs, and protection of input stages in studio and broadcast installations. The TX-AT1 is suitable for use in control rooms, OB vans, patch bays, and equipment racks where reliable isolation and low distortion are required. It is intended for professional technicians and engineers who need consistent line-level performance.
The unit ships in a compact cardboard box and is rated for ambient operating temperatures from 0 C to 55 C. Its small physical footprint and terminal-block wiring make installation quick and repeatable, and the transformer construction provides long-term mechanical and electrical stability. The TX-AT1 delivers a simple plug-in solution for isolating and protecting analog audio lines.