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| Part Number | GD30-31488-000 | GD-31288-000 | GD-31440-000 | GD-31475-000 | GD30-31593-000 |
| Manufacturer | Knowles | Knowles | Knowles | Knowles | Knowles |
| Series | GD30 | GD | GD | GD | GD |
| Packaging | Bulk | Tray | Tray | Tray | Tray |
| Product Status | Active | Active | Active | Active | Active |
| Technology | Magnetic | Magnetic | Magnetic | Magnetic | Magnetic |
| Type | Receiver, Balanced Armature | Receiver, Balanced Armature | Receiver, Balanced Armature | Receiver, Balanced Armature | Receiver, Balanced Armature |
| Frequency Range | 100 Hz ~ 6.7 kHz | 100 Hz ~ 6.7 kHz | 100 Hz ~ 6.7 kHz | 100 Hz ~ 6.7 kHz | 100 Hz ~ 6.7 kHz |
| Frequency - Self Resonant | - | - | - | - | - |
| Impedance | 281 Ohms | 281 Ohms | 223 Ohms | 42.9 Ohms | 223 Ohms |
| Efficiency - dBA | 100.00 | 100.00 | 100.00 | 100.00 | 100.00 |
| Efficiency - Testing | - | - | - | - | - |
| Efficiency - Type | Sound Pressure Level (SPL) | Sound Pressure Level (SPL) | Sound Pressure Level (SPL) | Sound Pressure Level (SPL) | Sound Pressure Level (SPL) |
| Power - Rated | - | 10 mW | 10 mW | 10 mW | 10 mW |
| Power - Max | 10 mW | 50 mW | 50 mW | 50 mW | 50 mW |
| Port Location | Top | Top | Top | Top | Top |
| Shape | Rectangular | Rectangular | Rectangular | Rectangular | Rectangular |
| Material - Cone | - | - | - | - | - |
| Material - Magnet | - | - | - | - | - |
| Ingress Protection | - | - | - | - | - |
| Ratings | - | - | - | - | - |
| Termination | Solder Pads | Solder Pads | Solder Pads | Solder Pads | Solder Pads |
| Size / Dimension | 0.240" L x 0.126" W (6.10mm x 3.20mm) | 0.236" L x 0.123" W (5.99mm x 3.12mm) | 0.236" L x 0.123" W (5.99mm x 3.12mm) | 0.236" L x 0.123" W (5.99mm x 3.12mm) | 0.240" L x 0.126" W (6.10mm x 3.20mm) |
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