Audio Transformers, Isolation & Valve Output | RS
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    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.

    114 Products showing for Audio Transformers

    OEP
    5kΩ
    4 Ω, 8 Ω
    320Ω
    12W
    -
    750mΩ
    87.3 x 52 x 49.5mm
    Panel Mount
    Solder
    465g
    49.5mm
    -
    87.3mm
    52mm
    OEP
    5.6kΩ
    4 Ω, 8 Ω, 16 Ω
    100Ω
    25W
    -
    432Ω
    100 x 84 x 68.6mm
    Panel Mount
    Solder
    2kg
    68.6mm
    -
    100mm
    84mm
    Murata Power Solutions
    -
    -
    -
    -
    -
    -
    9 x 6.35 x 10.16mm
    Through Hole
    -
    -
    10.16mm
    -
    9mm
    6.35mm
    OEP
    -
    320Ω
    2W
    500mA
    0.7Ω
    44.5 x 36 x 32.9mm
    Chassis Mount
    -
    190g
    32.9mm
    -
    44.5mm
    36mm
    OEP
    30 Ω, 100 Ω
    10 kΩ, 49 kΩ
    19Ω
    -
    -
    647Ω
    29.4 x 25 x 24.2mm
    Through Hole
    PC Pin
    56g
    24.2mm
    -
    29.4mm
    25mm
    OEP
    10kΩ
    10kΩ
    469 (Primary 1) Ω, 580 (Primary 2) Ω
    -
    -
    591Ω
    29.4 x 25 x 24.2mm
    Through Hole
    PC Pin
    56g
    24.2mm
    -
    29.4mm
    25mm
    OEP
    150Ω
    600Ω
    20.6Ω
    100mW Hz @ 300, 1mW Hz @ 30
    -
    1143Ω
    28 x 22 x 23.2mm
    Through Hole
    Pin
    -
    23.2mm
    -
    28mm
    22mm
    OEP
    -
    79Ω
    5W
    -
    1.3Ω
    81.5 x 45.5 x 39mm
    Chassis Mount
    -
    350g
    39mm
    -
    81.5mm
    45.5mm
    OEP
    600Ω
    -
    46Ω
    -
    -
    60Ω
    21.5 x 16.3 x 18mm
    Through Hole
    -
    -
    18mm
    -
    21.5mm
    16.3mm
    OEP
    150Ω
    -
    45Ω
    -
    -
    1.5kΩ
    25 x 18.5 x 19.3mm
    Through Hole
    -
    -
    19.3mm
    -
    25mm
    18.5mm
    OEP
    150 Ω, 600 Ω
    10kΩ
    38Ω
    -
    -
    1.085kΩ
    29.4 x 25 x 24.2mm
    Through Hole
    PC Pin
    56g
    24.2mm
    -
    29.4mm
    25mm
    OEP
    577Ω
    1 + 1kΩ
    49.8Ω
    -
    -
    48.5 (Secondary 1) Ω, 50 (Secondary 2) Ω
    29.4 x 25 x 24.2mm
    Through Hole
    PC Pin
    56g
    24.2mm
    -
    29.4mm
    25mm
    OEP
    140kΩ
    1 + 1kΩ
    3.2kΩ
    -
    -
    314Ω
    29.4 x 25 x 24.2mm
    Through Hole
    PC Pin
    56g
    24.2mm
    -
    29.4mm
    25mm
    Bourns
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    Murata Power Solutions
    -
    -
    -
    -
    -
    -
    9 x 6.35 x 10.16mm
    Through Hole
    -
    -
    10.16mm
    -
    9mm
    6.35mm
    OEP
    150 Ω, 600 Ω
    150 Ω, 600 Ω
    36.4Ω
    -
    -
    44.4Ω
    36 x 30 x 16mm
    Through Hole
    PC Pin
    57g
    16mm
    -
    36mm
    30mm
    OEP
    2.5 kΩ, 10 kΩ
    2.5 kΩ, 10 kΩ
    424Ω
    100mW
    -
    464Ω
    27.94 x 22.9 x 22.2mm
    Through Hole
    PC Pin
    40g
    22.2mm
    -
    27.94mm
    22.9mm
    OEP
    -
    4 → 16Ω
    191.5Ω
    1 W, 2 W, 5 W, 15 W, 30 W
    -
    0.2Ω
    105.5 x 65.5 x 58mm
    Chassis Mount
    -
    1kg
    58mm
    -
    105.5mm
    65.5mm
    Bourns
    -
    -
    -
    -
    -
    -
    17.7 x 17.7 x 12.6mm
    Chassis Mount
    -
    -
    12.6mm
    -
    17.7mm
    17.7mm
    OEP
    2.5 kΩ, 10 kΩ
    10kΩ
    2.1kΩ
    -
    -
    2.2kΩ
    32 x 15 x 27mm
    Through Hole
    -
    -
    27mm
    -
    32mm
    15mm
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