Engrove Audio Tools · Tonearm database reference
Ortofon RMG-309
Ortofon RMG-309 tonearm reference data for cartridge matching, effective mass, effective length and setup context.
Reference specifications
| Manufacturer | Ortofon |
|---|---|
| Model | RMG-309 |
| Effective mass | 28 g |
| Effective length | 321 mm |
| Headshell connector | sme_universal |
| Cartridge weight range | 20 g–40 g |
Setup context
Use this tonearm reference with the Tonearm Match Lab and Tonearm Geometry Lab to plan cartridge matching and alignment. The key setup inputs are effective mass and effective length.
Reference data is best-effort and should be checked against manufacturer documentation before critical setup decisions.