Side-by-Side Comparison
Jack Connectors
2.5mm TRRS vs. 3.5 mm TRRS
Comparing 2 standards across 7 specifications. 6 key differences identified.
Comparing:
2.5mm TRRS
3.5 mm TRRS
2.5mm TRRS adds a microphone conductor to the 2.5mm TRS jack, following the same CTIA or OMTP wiring conventions as 3.5mm TRRS. It served as a mobile phone headset jack -- including on older Nokia handsets -- before 3.5mm became the universal smartphone headset size.
3.5mm TRRS connectors transmit stereo audio plus a microphone signal over four conductors. CTIA wiring places ground on Ring 2 and mic on the sleeve; OMTP swaps ground to the sleeve and mic to Ring 2, causing muted or distorted audio when the two are mixed.
Specification Comparison Table
7 Parameters| Parameter / Spec | ||
|---|---|---|
|
Connector Family
|
Phone Jack (Micro-Mini) | Phone Jack (Mini-Jack) |
|
Shaft / Plug Diameter
|
2.5 mm | 3.5 mm (1/8") |
|
Conductors / Contacts
|
4 (Tip, Ring 1, Ring 2, Sleeve) | 4 (Tip, Ring 1, Ring 2, Sleeve) |
|
Signal Format
|
Stereo Audio + Microphone / Video | Stereo Audio + Microphone / Inline Remote |
|
CTIA Standard Pinout
|
Tip: Left | Ring 1: Right | Ring 2: Ground | Sleeve: Mic | Tip: Left | Ring 1: Right | Ring 2: Ground | Sleeve: Mic (Apple, Android) |
|
OMTP Standard Pinout
|
Tip: Left | Ring 1: Right | Ring 2: Mic | Sleeve: Ground | Tip: Left | Ring 1: Right | Ring 2: Mic | Sleeve: Ground (Legacy EU) |
|
Primary Applications
|
Pre-smartphone Nokia/mobile headsets, portable AV camcorder break-out | Smartphone headsets, gaming headsets, laptops with combo audio/mic jack |
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