COMPATIBILITY MATRIX
2.5 mm TRRS Balanced (Legacy Portable Balanced) vs 4.4 mm Pentaconn Balanced Connector
Side-by-side mechanical and electrical compatibility. Conditionally compatible
| Parameter | 2.5 mm TRRS Balanced (Legacy Portable Balanced) | 4.4 mm Pentaconn Balanced Connector |
|---|---|---|
| Diameter | 2.5mm | 4.4mm |
| Pole count | 4-pole TRRS | 5-pole TRRRS |
| Signal type | balanced | balanced |
| Reference standard | — | — |
| Origin year | — | — |
| Intended use | Legacy portable balanced headphone output (pre-2018) | Portable balanced headphone and IEM output |
Compatibility analysis
- Mechanical fit: Different diameters — physical mating impossible without an adapter.
- Conductor count: Different pole count — signals cannot be mapped 1:1.
- Signal topology: Same signal topology (balanced).
2.5 mm TRRS Balanced (Legacy Portable Balanced) specs → 4.4 mm Pentaconn Balanced Connector specs → Engineering cross-reference →