How late to this am I? 
Still, in the interests of posterity and hoping this will be of use to someone, sometime... (Taken from SIEMENS C72233-A10-A7‚ÌŽd—l ƒV�[ƒ�ƒ“ƒX)
Coaxial type speaker system combining a 25cm cone woofer and 9cm cone tweeter. The front is equipped with an acoustic lens, increasing the degree of diffusion of the high-frequency range. The input impedance of the coaxial speakers Siemens are unified in 15Ω. When an 8Ω for efficiency, there is a problem on the characteristics of the output of the amplifier you are using is recommended that you use between the power amplifier and the speaker impedance matching transformer.
Model: Full-range coaxial
Low: 25cm cone
High: 9cm cone
Impedance: 15 Ω
Max power: 10W
Freq: 60Hz – 16kHz
Fr: 65Hz
Induction: 1.2 T
Magnetism: 0.819mWb
Sensitivity: 98dB/1W
108dB/10W
Still, in the interests of posterity and hoping this will be of use to someone, sometime... (Taken from SIEMENS C72233-A10-A7‚ÌŽd—l ƒV�[ƒ�ƒ“ƒX)
Coaxial type speaker system combining a 25cm cone woofer and 9cm cone tweeter. The front is equipped with an acoustic lens, increasing the degree of diffusion of the high-frequency range. The input impedance of the coaxial speakers Siemens are unified in 15Ω. When an 8Ω for efficiency, there is a problem on the characteristics of the output of the amplifier you are using is recommended that you use between the power amplifier and the speaker impedance matching transformer.
Model: Full-range coaxial
Low: 25cm cone
High: 9cm cone
Impedance: 15 Ω
Max power: 10W
Freq: 60Hz – 16kHz
Fr: 65Hz
Induction: 1.2 T
Magnetism: 0.819mWb
Sensitivity: 98dB/1W
108dB/10W
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