17 cm (6.5") HiFi woofer with very good  price/performance ratio. Suitable for simple 2-way speakers and car rear  tray systems. Especially suited als replacement driver for many HiFi  speakers.
 
| Technical Data: | 
|---|
                                                   | Rated power | 40 W | 
                        | Maximum power | 70 W | 
                                 | Nominal impedance Z | 8 Ohm | 
                                  | Frequency response | fu–6000 Hz | 
                            | (fu: Lower cut-off frequency depending on cabinet) | . | 
                        | Mean sound pressure level | 87 dB (1 W/1 m) | 
                             | Opening angle (-6 dB) | 54°/4000 Hz | 
                             | Excursion limit | +/−7,5 mm | 
                        | Resonance frequency fs | 57 Hz | 
                        | Magnetic induction | 1,0 T | 
                        | Magnetic flux | 240 µWb | 
                        | Height of front pole-plate | 3 mm | 
                        | Voice coil diameter | 25 mm | 
                        | Height of winding | 7 mm | 
                        | Cutout diameter | 146 mm | 
                        | Net weight | 0,77 kg | 
                        | D.C. resistance Rdc | 7,2 Ohm | 
                        | Mechanical Q factor Qms | 2,92 | 
                        | Electrical Q factor Qes | 0,90 | 
                        | Total Q factor Qts | 0,69 | 
                        | Equivalent volume Vas | 24 l | 
                        | Effective piston area Sd | 137 cm² | 
                        | Dynamically moved mass Mms | 8,7 g | 
                        | Force factor Bxl | 5,0 T m | 
                        | Inductance of the voice coil L | 0,9 mH | 
                                                                                                                                                                              | Connections | 4,8 x 0,8 mm (+) 4,8 x 0,8 mm (−) |