Knowles is the originator of balanced armature technology which they apply to their receiver, specialty transducers and hearing aid products. Knowles is also a market-leading manufacturer of MEMS microphones, electret microphones, voice processors and acoustical component accessories.
| Product status | Preferred  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Woofer – Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 9.47  | 
		
| Width [mm] | 7.18  | 
		
| Thickness [mm] | 4.1  | 
		
| DC resistance [Ohm] | 19.7  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 125  | 
		
| Vented | Yes  | 
		
Knowles' largest and most powerful receiver. With its high efficiency and a 143dB SPL maximum output, the CI receiver provides high acoustic power.
| Product status | Preferred  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Woofer – Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 9.47  | 
		
| Width [mm] | 7.18  | 
		
| Thickness [mm] | 4.1  | 
		
| DC resistance [Ohm] | 19.7  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 125  | 
		
| Vented | Yes  | 
		
Knowles' largest and most powerful receiver. With its high efficiency and a 143dB SPL maximum output, the CI receiver provides high acoustic power.
| Product status | Preferred  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Woofer – Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 9.47  | 
		
| Width [mm] | 7.18  | 
		
| Thickness [mm] | 4.1  | 
		
| DC resistance [Ohm] | 19.7  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 125  | 
		
| Vented | Yes  | 
		
Knowles' largest and most powerful receiver. With its high efficiency and a 143dB SPL maximum output, the CI receiver provides high acoustic power.