| Model  | 
                            SP-218S | 
                          
                          
                            | PHYSICAL SPECIFICATION | 
                              | 
                          
                          
                            | System configuration | 
                            Dedicated Subwoofer | 
                          
                          
                            | Components & Loading | 
                            SK181000F dual 18", Vented | 
                          
                          
                            | Operating Mode | 
                            Passive | 
                          
                          
                            | Enclosure material | 
                            Plywood with MDF | 
                          
                          
                            | Enclosure Finish | 
                            Black warnex texture coated | 
                          
                          
                            | Connectors | 
                            Two neutrick speakon | 
                          
                          
                            | Grille | 
                            Powder coated perforated steel | 
                          
                          
                            | Optional accessories | 
                            1. STK caster "scp80"(80mm wheel) 
                              2. STK caster "scp100"(100mm wheel) | 
                          
                          
                            Demensions 
                              ( ¡¾0.13 inch / ¡¾3 mm) | 
                            Height: 1165 
                              Front width: 604 
                              Rear width: 357 
                              Depth: 754  | 
                          
                          
                            | Trapezoid angle(degrees) | 
                            20 | 
                          
                          
                            | Shipping/CBM | 
                            0.6923 | 
                          
                          
                            | Net weight | 
                            97kg  | 
                          
                          
                            | Shipping weight | 
                            110.7 kg  | 
                          
                          
                            | TECHNICAL SPECIFICATION  | 
                              | 
                          
                          
                            | Frequency Response | 
                              | 
                          
                          
                            | ¡¾3 dB | 
                            30Hz ~ 200Hz | 
                          
                          
                            | -10 dB | 
                            25Hz ~ 200Hz | 
                          
                          
                            | Recommended High-Pass Frequency | 
                            30Hz | 
                          
                          
                            | Axial Sensitivity(dB SPL, 1 watt @ 1m) | 
                            98 | 
                          
                          
                            | Nominal Input Impedance(ohms) | 
                            4 | 
                          
                          
                            | Power Handling(Watts, Continuous) | 
                            2000 | 
                          
                          
                            | Power Handling(Watts,Program/ Peak) | 
                            4000/8000 | 
                          
                          
                            | Max Calculated SPL (Referenced to 1 m) | 
                              | 
                          
                          
                            | Peak | 
                            136 | 
                          
                          
                            | Long Term | 
                            130 | 
                          
                          
                            | Suggested System A | 
                            STK VS-40 | 
                          
                          
                            | Suggested System B  | 
                            STK VS-34 |