Audio Transformers

Audio Transformers are transformers designed to be used in the amplifiers and high-frequency audio and voice circuits, for coupling ad impendence matching applications. The transformers allow an AC input signal to produce a related AC output signal without the input and the output being physically connected together. This is accomplished by having two or more coils of insulated wire wound around a magnetic metal core. When the AC signal passes through the input winding, a related AC signal appears on the output winding via the inductive coupling.
Audio Transformers perform several functions:
• They can step up (increase) or step down (decrease) a signal voltage
• They can increase or decrease the impedance of circuit
• Convert the circuit from unbalanced to balanced and from balanced to unbalanced
• Block DC current in a circuit while allowing the AC current flow
• They electrically isolate one audio device from another

There are two main types of transformers:
• Step-up / Step-down transformers – The primary and the secondary coils have a different number of windings, that means they have different impedances. Different impedances cause the signal level changed as it goes through the transformer.
• 1:1 transformers – Each coil has exactly the same number of windings which makes the impedance identical. This transformer doesn’t change the signal level but guarantees the physical electrical insulation between coils. These transformers are usually called Isolation Transformers.

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Description Price Primary Impedance Secondary Impedance Primary DC Resistance Power Rating Current Rating Secondary DC Resistance Dimensions Mounting Type Termination Type Weight Depth Diameter Length Width
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RS Stock No. 188-9068
Mfr. Part No.2337822-2
$9.405
Each (In a Pack of 2)
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- - - - - - 18.25 x 12.24 x 6.99mm PCB Mount PC Pin - 6.99mm - 18.25mm 12.24mm
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RS Stock No. 188-9061
Mfr. Part No.2337826-1
$24.84
Each (In a Pack of 2)
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- - - - - - 31 x 12.25 x 6.99mm PCB Mount PC Pin - 6.99mm - 31mm 12.25mm
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RS Stock No. 188-9074
Mfr. Part No.2337822-5
$18.81
Each (In a Pack of 2)
units
- - - - - - 18.25 x 12.24 x 6.99mm PCB Mount PC Pin - 6.99mm - 18.25mm 12.24mm
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RS Stock No. 188-8840
Mfr. Part No.2337822-1
$4.743
Each (On a Reel of 750)
units
- - - - - - 12.7 x 8.7 x 5.95mm PCB Mount PC Pin - 5.95mm - 12.7mm 8.7mm
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RS Stock No. 188-8846
Mfr. Part No.2337822-5
$11.898
Each (On a Reel of 450)
units
- - - - - - 18.25 x 12.24 x 6.99mm PCB Mount PC Pin - 6.99mm - 18.25mm 12.24mm
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RS Stock No. 188-8843
Mfr. Part No.2337822-2
$6.61
Each (On a Reel of 450)
units
- - - - - - 18.25 x 12.24 x 6.99mm PCB Mount PC Pin - 6.99mm - 18.25mm 12.24mm
New
RS Stock No. 188-8844
Mfr. Part No.2337824-2
$11.022
Each (On a Reel of 350)
units
- - - - - - 31.3 x 12.2 x 6.99mm PCB Mount PC Pin - 6.99mm - 31.3mm 12.2mm
New
RS Stock No. 188-9058
Mfr. Part No.2337822-1
$7.29
Each (In a Pack of 2)
units
- - - - - - 12.7 x 8.7 x 5.95mm PCB Mount PC Pin - 5.95mm - 12.7mm 8.7mm
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RS Stock No. 188-8842
Mfr. Part No.2337822-4
$8.951
Each (On a Reel of 750)
units
- - - - - - 12.7 x 8.7 x 5.95mm PCB Mount PC Pin - 5.95mm - 12.7mm 8.7mm
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RS Stock No. 188-9071
Mfr. Part No.2337824-2
$17.83
Each (In a Pack of 2)
units
- - - - - - 31.3 x 12.2 x 6.99mm PCB Mount PC Pin - 6.99mm - 31.3mm 12.2mm
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RS Stock No. 188-9077
Mfr. Part No.2337824-4
$35.71
Each (In a Pack of 2)
units
- - - - - - 31.3 x 12.2 x 6.99mm PCB Mount PC Pin - 6.99mm - 31.3mm 12.2mm
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RS Stock No. 188-9065
Mfr. Part No.2337822-4
$13.905
Each (In a Pack of 2)
units
- - - - - - 12.7 x 8.7 x 5.95mm PCB Mount PC Pin - 5.95mm - 12.7mm 8.7mm
New
RS Stock No. 188-8841
Mfr. Part No.2337826-1
$15.678
Each (On a Reel of 400)
units
- - - - - - 31 x 12.25 x 6.99mm PCB Mount PC Pin - 6.99mm - 31mm 12.25mm
New
RS Stock No. 188-8847
Mfr. Part No.2337824-4
$20.021
Each (On a Reel of 350)
units
- - - - - - 31.3 x 12.2 x 6.99mm PCB Mount PC Pin - 6.99mm - 31.3mm 12.2mm