17 cm (6.5") HiFi woofer with coated paper cone, elastic rubber surround and inverse dust-cap. Due to the balanced frequency response  also suitable as low-midrange driver for 4-way speaker systems. Due to  the special basket design especially suitable as replacement driver for  many HiFi speakers.
 
| Technical Data: | 
|---|
                                                   | Rated power | 60 W | 
                        | Maximum power | 90 W | 
                                 | Nominal impedance Z | 8 Ohm | 
                                  | Frequency response | fu–7000 Hz | 
                            | (fu: Lower cut-off frequency depending on cabinet) | . | 
                        | Mean sound pressure level | 88 dB (1 W/1 m) | 
                             | Opening angle (-6 dB) | 47°/4000 Hz | 
                             | Excursion limit | +/−6,5 mm | 
                        | Resonance frequency fs | 45 Hz | 
                        | Magnetic induction | 0,8 T | 
                        | Magnetic flux | 314 µWb | 
                        | Height of front pole-plate | 5 mm | 
                        | Voice coil diameter | 25 mm | 
                        | Height of winding | 12 mm | 
                        | Cutout diameter | 150 mm | 
                        | Net weight | 0,97 kg | 
                        | D.C. resistance Rdc | 5,8 Ohm | 
                        | Mechanical Q factor Qms | 2,2 | 
                        | Electrical Q factor Qes | 1,28 | 
                        | Total Q factor Qts | 0,81 | 
                        | Equivalent volume Vas | 22 l | 
                        | Effective piston area Sd | 143 cm² | 
                        | Dynamically moved mass Mms | 16 g | 
                        | Force factor Bxl | 3,9 T m | 
                        | Inductance of the voice coil L | 0,9 mH | 
                                                                                                                                                                              | Connections | 5,2 x 0,8 mm (+) 2,8 x 0,8 mm (−)
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