| PartNumber | CM-28421-000 | CM-28452-000 | CM-28431-000 |
| 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 | Speakers | Speakers | Speakers |
| Type | Balanced Armature | Balanced Armature | Balanced Armature |
| Frequency | 5 kHz | 5 kHz | 500 Hz |
| Sound Pressure Level | 106 dBA | 110 dBA | 119 dBA |
| Impedance | 360 Ohms | 360 Ohms | 30 Ohms |
| Shape | Round | Round | Round |
| Termination Style | Solder Pad | Solder Pad | Solder Pad |
| Diameter | 16.54 mm | 16.54 mm | 16.54 mm |
| Length | 8.38 mm | 8.38 mm | 8.38 mm |
| Depth | 8.38 mm | 8.38 mm | 8.38 mm |
| IP Rating | - | - | - |
| Packaging | Bulk | Bulk | Bulk |
| Brand | Knowles | Knowles | Knowles |
| Length in | 0.33 in | 0.33 in | 0.33 in |
| Length mm | 8.38 mm | 8.38 mm | 8.38 mm |
| Product Type | Speakers & Transducers | Speakers & Transducers | Speakers & Transducers |
| Factory Pack Quantity | 1 | 25 | 25 |
| Subcategory | Audio Devices | Audio Devices | Audio Devices |