Specifications:
2.75" Dual Cone Speaker 
OEM Drop in Replacement Design
Black 2-layer Paper, DDC (Dynamic Damping Coating) Cone 
Double Pressed UV Treated Foam Surround 
3 oz. Motor Structure
Shallow Mounting Depth  
EFF Motor Structures (Efficient Flux Field) 
4-ohm System Impedance
Specifications
Nominal Impedance: 4-ohm
Material: 2 Layer Paper DDC cone
Magnet Size: 3 oz
Sensitivity (1W / 1M): 90 dB
Mounting Depth: 1.25 in
Size: 2.75 in
Sensitivity: 90 dB
Frequency Response: 150 Hz - 19 kHz
Power Handling (RMS/Peak): 30 / 90 watts Each Speaker