How many types of 3.5mm headphone jacks are there?

Common 3.5mm headphone jack types found in consumer electronics include: TRS, TRRS, TRRRS, balanced, and stereo mini plugs. TRS is used for stereo audio, TRRS is used for microphone or headphone control, TRRRS is used for multiple control functions, balanced is used for professional audio, and stereo mini plug is used for two-channel equipment.

3.5mm headphone jack type

3.5mm headphone jack, also known as auxiliary input/output (AUX ) interface, ubiquitous in consumer electronic devices. The following are some common 3.5mm headphone jack types:

1. TRS (three-pole ring type)

The TRS interface is the most common 3.5mm interface type. Use For transmitting stereo audio signals. It has three conductors:

• Left channel
• Right channel
• Ground wire

2. TRRS ( Four-pole ring type)

The TRRS interface adds an extra conductor to the TRS interface for transmitting microphone or headphone control signals. It has four conductors:

• Left Channel
• Right Channel
• Ground
• Microphone/Control

3. TRRRS (five-pole ring type)

The TRRRS interface has one more conductor than the TRRS interface and is used to transmit multiple buttons or control functions on the headset. It has five conductors:

• Left Channel
• Right Channel
• Ground
• Microphone
• Other Controls

4. Balanced

The balanced 3.5mm interface is used for professional audio equipment. It has two TRS interfaces that transmit balanced signals of the left and right channels respectively. Balanced signals eliminate electromagnetic interference and provide better sound quality.

5. Stereo Mini Plug

This is another rare 3.5mm connector type, used to connect two-channel devices such as headphones or speakers. It has only two conductors:

• Left channel
• Right channel

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