SPECIAL FEATURES 

• Beryllium dome for non-resonant high frequency extension
• Copper cap on pole piece for reduced voice coil inductance and minimum phase shift
• CCAW voice coil for low moving mass
• Internal pressure equalization and flow resistor for non-resonant coupling of cavities
• Long life flexible lead wires
• Inherently shielded neodymium motor system
• Compact design
• Low resonance frequency