Here are some of the features of the Pyramid 4091:
Standard 4'' Size Fits OEM Locations
Blue Injected Polypropylene Cone
Non-Fatiguing Rubber Surround
Polymide Dome Midrange
Peizo Tweeter
High Temperrature Alumimum Voice Coil
40 oz. Strontium Magnet Structure
Rubber Boot Magnet Cover
Power Handling:200 Watts
Impedance: 4 Ohm
Frequency Response: 75Hz-20kHz
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