Details

ETAL designs and manufactures line matching transformers that are sometimes known simply as line matching transformers. They are often used in large buildings for overhead paging and music. For example, speaker line matching transformers might be found in speaker equipment at schools, office buildings, warehouses, hotels, or shopping centers.

Line matching transformers are mostly used in electronic audio circuits. It is used to match the impedances/resistances of input and output stages to obtain maximum output. ( Use of Maximum Power Transfer Theorem).

ETAL Transformers are used in telecom, industrial, military and aerospace, automotive, oil and gas, medical and renewable energy. Etal transformers products are sold to demanding customers around the globe. Line matching transformers, also known as impedance matching transformers, are devices used in audio systems to match the impedance of one device to another, typically between audio sources and amplifiers. They are essential for efficient power transfer and to minimize signal loss or distortion.

Line matching transformer connects a balanced low-impedance microphone output to an unbalanced high impedance input. This transformer converts the low-impedance signal of a microphone to high-impedance for connecting to a device. In this process, the transformer is providing additional gain for the optimal signal level.

Transformer is a static device which transforms electrical energy from one circuit to another without any direct electrical connection and with the help of mutual induction between two windings without change in frequency. The primary purpose of a line matching transformer is to match the impedance of the audio source to the input impedance of the amplifier. When the impedance is mismatched, it can result in signal loss, distortion, and inefficient power transfer.

Impedance Matching:

Impedance is the opposition that an electrical circuit presents to the flow of alternating current. Matching the impedance ensures maximum power transfer from the source to the load (amplifier), preventing signal degradation.

Features:

• Transformation Ratio: This is the ratio of the number of turns in the primary coil to the number of turns in the secondary coil. It determines how much the voltage is stepped up or down.

• Frequency Response: Line matching transformers are designed to work within specific frequency ranges. High-quality transformers have a wide frequency response to accurately transmit the entire audio spectrum.

• Isolation: They provide electrical isolation between the source and the load, which can help in reducing ground loop issues and noise.

• Grounding: Some transformers offer options for grounding, which can be important in certain setups to avoid hums and interference.

Types:

• Step-Up Transformers: These increase the voltage from the source to match the input of the amplifier.

• Step-Down Transformers: These decrease the voltage from the source to match the input of the amplifier.

• 1:1 Transformers: These maintain the same voltage level but are used for impedance matching.

Etal is a specialist in custom products and in optimising designs to satisfy our customers' specific requirements in the most cost and environmentally effective way. Etal's aim is to work closely with the customer's design department and raw material suppliers to be flexible and to deliver with short lead times.