# item.guide
Side-by-Side Comparison Jack Connectors

2.5mm TRS vs. 6.35 mm (1/4") TRS

Comparing 2 standards across 7 specifications. 5 key differences identified.

Comparing:
2.5mm TRS
6.35 mm (1/4") TRS
2.5mm TRS →

2.5mm TRS is the smallest common member of the phone-connector family -- the same tip-ring-sleeve wiring as 3.5mm TRS, scaled down to a 2.5mm shaft. It was used for headset jacks on cordless phones, two-way radios, and early portable tape recorder remotes before 3.5mm became the standard smaller size.

View full 2.5mm TRS spec sheet →
6.35 mm (1/4") TRS →

6.35mm TRS is the 3-conductor version of the quarter-inch phone connector, wired for either balanced mono line/microphone signals in professional audio gear or stereo signals in full-size headphones -- the same wiring logic as 3.5mm TRS at four times the shaft diameter.

View full 6.35 mm (1/4") TRS spec sheet →

Specification Comparison Table

7 Parameters
Parameter / Spec
2.5mm TRS
6.35 mm (1/4") TRS
Connector Family
Phone Jack (Micro-Mini) Phone Jack (Quarter-Inch / Standard Phone)
Shaft / Plug Diameter
2.5 mm 6.35 mm (1/4")
Conductors / Contacts
3 (Tip, Ring, Sleeve) 3 (Tip, Ring, Sleeve)
Signal Format
Unbalanced Stereo / Balanced Mono Balanced Mono / Unbalanced Stereo
Standard Stereo Pinout
Tip: Left | Ring: Right | Sleeve: Ground Tip: Left | Ring: Right | Sleeve: Ground
Primary Applications
Cordless phones, two-way radios, legacy mobile headsets, micro audio gear Studio reference headphones, audio interface line in/out, balanced mixer interconnects
Balanced Mono Pinout
— Tip: Hot (+) | Ring: Cold (-) | Sleeve: Ground

Other Alternatives to Compare

Compare 2.5mm TRS vs. 2.5mm TRRS → Compare 2.5mm TRS vs. 3.5 mm TRRS → Compare 2.5mm TRS vs. 3.5 mm TRS → Compare 2.5mm TRS vs. 6.35mm TS → Compare 2.5mm TRS vs. Coaxial Cable Types (RG Series) → Compare 2.5mm TRS vs. RCA → Compare 2.5mm TRS vs. XLR 3-Pin → Compare 2.5mm TRS vs. XLR 4-Pin → Compare 2.5mm TRS vs. XLR 5-Pin →