An audio transformer is used in audio circuits to block interference from radio frequencies and DC components, or for combining and splitting audio signals, or for matching between low and high impedance circuits such as amplifiers and loudspeakers. Though originally developed to be used in telephone systems, transformers may be part of your professional audio system and its components today.
What Causes “Hum” and “Buzz” And How Does It Get Into My System?
Problems with audio equipment and transformers generally occur due to the fact that they are magnetic devices and are affected by external magnetic fields which cause “hum” and “buzz” on the line. This happens when a current flows into the cable shield connections between different pieces of equipment in an unbalanced system. They can also occur in balanced systems if the ground voltage varies between pieces of equipment.
How Can I Get Rid Of “Hum” And “Buzz”?
An audio transformer can eliminate hum and buzz in an unbalanced system because it prevents the flow of ground currents in the cable shields. It is also effective for increasing the common mode rejection capabilities of input circuits within a balanced equipment system.
How Can An Audio Transformer Improve Signal Quality?
Without interference from external sources, signal quality is clearer and thus the sound is better and more pleasant to listen to. Without external magnetic interference such as that generated by AC current carrying conductors, hum and buzz will be eliminated, producing a clearer and higher quality signal.
How Can I Tell If My Transformer Is High Quality?
The best audio transformers for low frequency response will have a relatively large iron core. The more power your system uses, the larger core size you will need. High frequency response needs carefully implemented windings that don’t have excessive leakage or stray capacitance. This can be quite expensive, so you should consult with a respected audio professional such as the experts at CET Technology.
CET Technology is the best choice for high quality and competitively priced transformers plus standard and custom magnetics. For the best price on an audio transformer, plus a great selection of inductors, DC converters, linear and switching power supplies, call CET Technology (603) 894 – 6100, where we build relationships one component at a time.