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 – Dual diaphgram  | 
		
| Configuration | Dual diaphgram  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 3.56  | 
		
| DC resistance [Ohm] | 28  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 120  | 
		
| Vented | Yes  | 
		
Woofer, Hi-Output
Proprietary design delivers first-in-class output / size ratio
Woofer / Midrange with low THD in multi-driver IEMs
| Product status | Preferred  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Woofer – Dual diaphgram  | 
		
| Configuration | Dual diaphgram  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 3.56  | 
		
| DC resistance [Ohm] | 28  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 120  | 
		
| Vented | Yes  | 
		
Woofer, Hi-Output
Proprietary design delivers first-in-class output / size ratio
Woofer / Midrange with low THD in multi-driver IEMs
| Product status | Preferred  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Woofer – Dual diaphgram  | 
		
| Configuration | Dual diaphgram  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 3.56  | 
		
| DC resistance [Ohm] | 28  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 120  | 
		
| Vented | Yes  | 
		
Woofer, Hi-Output
Proprietary design delivers first-in-class output / size ratio
Woofer / Midrange with low THD in multi-driver IEMs