The back of the drivers have the following information:

• Goodmans of England
• 415 Triaxiom
  
• 15" Full Range Drivers
  
• 3 way speakers
• Total useable frequency range 20 - 35,000 C/S
• Exact frequency range 20 - 20,000 C/S
• Impedance – 16 ohms
• Max. power capacity 40 watts
• These Full Range drivers weigh approx 23 lbs each