Part	Shape	Efficiency - dBA	Impedance	Efficiency - Type	Technology	Port Location	Termination	Height - Seated (Max)	Type	Frequency Range (Max)	Frequency Range (Min)	Size / Dimension Width	Size / Dimension Length	Material - Magnet
Knowles Syfer ED-21912-000	Rectangular	106 dBA	725 Ohms	Sensitivity	Magnetic	Top	Solder Pads	0.248 in	Receiver	5 kHz	200 Hz	0.169 in	0.248 in
Knowles Syfer FED-23732-I34	Rectangular	102 dBA	680 Ohms		Magnetic		Solder Pads		Balanced Armature Receiver	4 kHz	200 Hz			Ferrite
Knowles Syfer ED-23147-000	Rectangular	102.5 dBA	87 Ohms	Sound Pressure Level (SPL)	Magnetic	Top	Solder Pads	0.248 in	Balanced Armature Receiver	4.4 kHz	200 Hz	0.169 in	0.248 in
Knowles Syfer ED-27045-000	Rectangular	104 dBA	395 Ohms	Sound Pressure Level (SPL)	Magnetic	Side	Wire Leads		Balanced Armature Receiver	20 kHz	20 Hz
Knowles Syfer ED-27235-000	Rectangular				Magnetic		Solder Pads		Balanced Armature Receiver
Knowles Syfer ED-26565-000	Rectangular	102.5 dBA	128 Ohms		Magnetic	Side	Solder Pads	0.119 in	Balanced Armature Receiver	4 kHz	200 Hz	0.169 in	0.248 in
Knowles Syfer ED-23004-000	Rectangular	107 dBA	1.5 kOhms	Sensitivity	Magnetic	Top	Solder Pads	0.248 in	Balanced Armature Receiver	5 kHz	200 Hz	0.169 in	0.248 in
Knowles Syfer FED-26792-I02	Rectangular	102.5 dBA	100 Ohm	Sound Pressure Level (SPL)	Magnetic	Top	Solder Pads	0.248 in	Balanced Armature Receiver	4 kHz	200 Hz	0.169 in	0.248 in	Ferrite
Knowles Syfer ED-21983-000	Rectangular	106 dBA	725 Ohms	Sensitivity	Magnetic	Top	Solder Pads	0.248 in	Balanced Armature Receiver	5 kHz	200 Hz	0.169 in	0.248 in
Knowles Syfer ED-21915-000	Rectangular	106 dBA	5.9 kOhm	Sensitivity	Magnetic	Top	Solder Pads	0.248 in	Balanced Armature Receiver	5 kHz	200 Hz	0.169 in	0.248 in

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