10 cm (4") high-end coaxial loudspeaker with very wide frequency range and particularly balanced frequency response. 
The most important features of the HX 10 are: extremely lightweight and solid aluminium cone; high quality tweeter; integrated grille; neodymium magnet; crossover  network mounted under a plastic cap on the rear side to save space;  connection via fast-on plugs 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-); 25 mm  voice-coil for high power handling
 
 
Technical Data:
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                                                   | Rated power | 40 W | 
                        | Maximum power | 60 W | 
                                 | Nominal impedance Z | 4 Ohm | 
                                  | Frequency response | fu–20000 Hz | 
                            | (fu: Lower cut-off frequency depending on cabinet) | . | 
                        | Mean sound pressure level | 81 dB (1 W/1 m) | 
                                  | Maximum linear displacement | +/−1,5 mm | 
                             | Resonance frequency fs | 70 Hz | 
                        | Magnetic induction | 1,1 T | 
                        | Magnetic flux | 346 µWb | 
                        | Height of front pole-plate | 4 mm | 
                        | Voice coil diameter | 25 mm | 
                        | Height of winding | 7 mm | 
                        | Cutout diameter | 101 mm | 
                        | Net weight | 0,52 kg | 
                        | D.C. resistance Rdc | 4,3 Ohm | 
                        | Mechanical Q factor Qms | 2,87 | 
                        | Electrical Q factor Qes | 0,61 | 
                        | Total Q factor Qts | 0,50 | 
                        | Equivalent volume Vas | 5,1 l | 
                        | Effective piston area Sd | 55 cm² | 
                        | Dynamically moved mass Mms | 4,3 g | 
                        | Force factor Bxl | 3,9 Tm | 
                                            | Turn-over frequency | 4300 Hz | 
                                                                                                                                                          | Connections | 4,8 x 0,8 mm (+) 2,8 x 0,8 mm (−)
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                                                  | Temperature range | −25 ... 70 °C |