Topaz Ultra Line Noise Isolator Transformer 91002-31

About the Topaz Ultra Line Noise Isolator Transformer 91002-31

The Topaz Ultra Line Noise Isolator Transformer model 91002-31 is a 2.5 kVA (2500 VA), 50/60 Hz isolation transformer designed for ultra-clean power delivery in high-end audio systems. It features extremely low inter-winding capacitance of 0.0005 pF, resulting in greater than 146 dB attenuation of common-mode noise and 65 dB reduction of normal-mode noise, providing a 20,000,000-to-1 reduction of common-mode noise up to 20 kHz. This transformer supports input and output voltages of 120/240 V and is UL and cUL listed, meeting UL544 requirements. It has a compact footprint (approximately 8 x 8 x 15 inches) and weighs about 65 to 100 lbs. The design includes large opposing toroidal windings, exclusive shielding, and low leakage current, making it safe for sensitive environments such as hospitals and medical labs. It offers overload capacity of 600% for 1 cycle and 300% for 30 seconds, dielectric strength of 2,500 VAC minimum, and typical efficiency of 95%. This model is highly sought after for its ability to provide ultra-clean, steady, and noise-free power, significantly improving audio dynamics and background noise levels.