PVC insulated, lapped or braid screened microphone cables are used for hand-held or fixed microphones. The star-quad formation of relay cables minimise mutual interference between adjacent pairs by use of opposite cores for each circuit pairs.
Single Core
| Approx | Capacitance | |||||||||
| Type | Conductor | Insulation | R/t | Colour | Screen | Sheath | R/t | Diam | Weight | (Core to Screen) |
| (mm) | (mm) | (mm) | (Kg/Km) | pF/Metre | ||||||
| M231 | 16/0.2TCW | PVC | 0.45 | Black | Braid | PVC | 0.65 | 3.7 | 30 | 305 |
| M233 | 7/0.2TCW | PVC | 0.45 | Blue | Lapped | PVC | 0.65 | 3.2 | 21 | 265 |
| M234 | 16/0.2TCW | PVC | 0.45 | Black | Lapped | PVC | 0.65 | 3.4 | 22 | 320 |
Two Core
| Approx | Capacitance | |||||||||
| Type | Conductor | Insulation | R/t | Colour | Screen | Sheath | R/t | Diam | Weight | (Core to Screen) |
| (mm) | (mm) | (mm) | (Kg/Km) | pF/Metre | ||||||
| M248 | 7/0.2TCW | PVC | 0.3 | Red/Black | Braid | PVC | 0.5 | 3.9 | 24 | 35 |
| M250 | 7/0.2TCW | PVC | 0.45 | Red/Black | Lapped | PVC | 0.65 | 4.7 | 35 | 29 |
| M251 | 16/0.2TCW | PVC | 0.45 | Red/Black | Braid | PVC | 0.65 | 5.6 | 49 | 19 |
All dimensions are nominal unless otherwise specified.