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| A mobile crew and a response identical to the 215-2000 alnico.  Its advantage is the possibility of adjusting these parameters thanks to a powerful electromagnetic motor. Adaptable to many speakers, it requires an external power supply (ideal from 10 to 14V for 5A).  | ||||||||||||||||||||||||||||||||||||
 
  | mms  | cms  | R dc  | |||||||||||||||||||||||||||||||||
53 Hz  | 18.5 g  | 0.49  | 6.5  | 
Food  | 6 V | 7 V  | 8 V  | 9 V  | 10 V  | 11 V  | 12 V  | 
| Vas | 154 | 158 | 154 | 156 | 154 | 155 | 154 | 
qt  | 0.64 | 0.49  | 0.39  | 0.31  | 0.27  | 0.25  | 0.21  | 
Qe  | 0.68 | 0.51  | 0.41  | 0.32  | 0.27  | 0.25  | 0.22  | 
Qm  | 10.48 | 10  | 9.31  | 9.33  | 8.83  | 7.9  | 8.2  | 
bl  | 7.74 | 8.8  | 9.98  | 11.1  | 12.1  | 12.6  | 13.5  | 
SPL ref  | 97.1 | 98.5  | 99.4  | 100  | 101  | 101  | 102  | 
| Speaker Power (W RMS) | 70.0 | 
| Speaker Type | Midbass | 
| Impedance (Ω) | 8 | 
| Loudspeaker diameter (mm) | 280.0 | 
| Diaphragm type | N/A | 
| Efficiency / Sensitivity (dB) | 102.0 | 
| Max Linear Excursion (Xmax) (mm) | 4.0 | 
| Lowest frequency (Hz) | 50 | 
| Highest frequency (Hz) | 7000 |