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 | Active  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 2.79  | 
		
| DC resistance [Ohm] | 22  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 117  | 
		
| Vented | No  | 
		
The TEC combines output comparable to the larger BK receiver in an ultra-thin package. TEC is suitable for multi-element earphone designs.
| Product status | Active  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 2.79  | 
		
| DC resistance [Ohm] | 22  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 117  | 
		
| Vented | No  | 
		
The TEC combines output comparable to the larger BK receiver in an ultra-thin package. TEC is suitable for multi-element earphone designs.
| Product status | Active  | 
		
|---|---|
| Description | Balanced armature receiver  | 
		
| Frequency response curve | Midrange  | 
		
| Configuration | Single  | 
		
| Diameter / length [mm] | 7.87  | 
		
| Width [mm] | 4.09  | 
		
| Thickness [mm] | 2.79  | 
		
| DC resistance [Ohm] | 22  | 
		
| Sensitivity @ 1kHz, 100 mV, in coupler [dB SPL] | 117  | 
		
| Vented | No  | 
		
The TEC combines output comparable to the larger BK receiver in an ultra-thin package. TEC is suitable for multi-element earphone designs.