| PartNumber | EC-27817-000 | EC-27906-000 | EC-27401-000 |
| Description | Speakers & Transducers Balanced Armature Speaker | Speakers & Transducers Balanced Armature Speaker | Speakers & Transducers Balanced Armature Speaker |
| Manufacturer | Knowles | Knowles | Knowles |
| Product Category | Speakers & Transducers | Speakers & Transducers | Speakers & Transducers |
| RoHS | Y | Y | Y |
| Product | Receivers | Receivers | Receivers |
| Type | Balanced Armature | Balanced Armature | Balanced Armature |
| Frequency | 4 kHz | 3.4 kHz | 3.4 kHz |
| Sound Pressure Level | 108 dBA | 113 dBA | 113.5 dBA |
| Impedance | 154 Ohms | 575 Ohms | 152 Ohms |
| Termination Style | Solder Pad | Solder Pad | Solder Pad |
| Length | 7.57 mm | 7.57 mm | 7.57 mm |
| Width | 4.31 mm | 4.31 mm | 4.31 mm |
| Depth | 3.7 mm | 3.7 mm | 3.7 mm |
| IP Rating | - | - | - |
| Packaging | Bulk | Bulk | Bulk |
| Series | EC/FEC | EC/FEC | EC/FEC |
| Brand | Knowles | Knowles | Knowles |
| Length in | 0.298 in | 0.298 in | 0.298 in |
| Length mm | 7.57 mm | 7.57 mm | 7.57 mm |
| Product Type | Speakers & Transducers | Speakers & Transducers | Speakers & Transducers |
| Factory Pack Quantity | 25 | 1 | 25 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |
| Width in | 0.17 in | 0.17 in | 0.17 in |
| Width mm | 4.31 mm | 4.31 mm | 4.31 mm |
| Shape | - | - | Rectangular |