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AUDIO ISOLATION TRANSFORMERS


Audio isolation transformers are designed to remove hum and buzz created by ground loops. Normal voltage differences in the system grounding points between different pieces of equipment cause small AC power currents to flow in the shield of audio cables. Capacitance between a power transformer’s primary and secondary windings introduce signals to the circuit ground which will also create small current flows in the cable shield. Either of these problems will create hum in audio signals. A transformer breaks the inter-equipment ground path and greatly increases the rejection in the input circuits while remaining transparent to the audio signal. Models are also available with internal video hum eliminator to remove both audio and video interference.


Click on Image to Enlarge Model# Impedance Bandwidth Size Weight Price
Model A250 A250 10K W 20 - 20 KHz 4.7 x 4.1 x 2.1 3.0 lbs $ 100
Model AV300 AV300 75 W
10K W
DC - 200 MHz
150 - 15 KHz
4.7 x 4.1 x 2.1 2.75 lbs $ 125
Model AV325 AV325 75 W
10K W
DC - 200 MHz
150 - 15 KHz
4.7 x 4.1 x 2.1 2.75 lbs $ 125
Model XLR100 XLR100 600 W 20 - 20 KHz 4.0 x 2.5 x 2.0 1.0 lbs $ 65
Model XLR200 XLR200 600 W 20 - 20 KHz 6.0 x 2.5 x 2.0 2.0 lbs $ 125
Sub100 10K W 20 - 20 KHz 4.0 x 2.5 x 2.0 1.5 lbs $ 65
 

©2002 Empire State Filter Co., Inc.   1559 Lincoln Avenue, Holbrook, NY   11741
  Phone: 631-589-0950   888-345-8370   www.empirefilter.com