| Model  | 
                            SP-158AP | 
                          
                          
                            | ENCLOSURE SPECIFICATION  | 
                              | 
                          
                          
                            | System configuration | 
                            Powered Subwoofer | 
                          
                          
                            | Components & Loading | 
                            One SK15500F 15¡±, Bass-reflex | 
                          
                          
                            | Operating Mode | 
                            Active | 
                          
                          
                            | Frequency Response | 
                              | 
                            
                          
                            | ¡¾3 dB | 
                            53Hz ~ 350Hz | 
                            
                          
                            | -10 dB | 
                            45Hz ~ 350Hz | 
                          
                          
                            | Axial Sensitivity(dB SPL, 1 watt @ 1m) | 
                            99 | 
                            
                          
                            | Nominal Input Impedance(ohms) | 
                            4 | 
                          
                          
                            | Power Handling(Watts, Continuius) | 
                            400 | 
                          
                          
                            | Power Handling(Watts, Peak) | 
                            1600 | 
                          
                          
                            Calculated SPL Limit 
                              (Referenced to 1 m) | 
                              | 
                          
                          
                            | Peak | 
                            132dB | 
                          
                          
                            | Long Term | 
                            126dB | 
                          
                          
                            | Optional Accessries 1 | 
                            STK Caster "SCP80" or "SCP 100" | 
                          
                          
                            | Optional Accessries 2 | 
                            STK Pole "SPM35130" | 
                          
                          
                            Demensions 
                              ( ¡¾0.13 inch / ¡¾3 mm) | 
                            Height 540 | 
                          
                          
                            | Front width 476  | 
                          
                          
                            | Depth 595  | 
                          
                          
                            | Trapezoid angle(degrees) | 
                              | 
                          
                          
                            | Shipping/CBM | 
                            0.26 | 
                          
                          
                            | Net weight | 
                            41.9 kg | 
                          
                          
                            | Shipping weight | 
                            45.94 kg | 
                          
                          
                            | AMPLIFIER SPECIFICATION  | 
                              | 
                          
                          
                            | Output Power | 
                              | 
                          
                          
                            | 4 ohm | 
                            400W x 2 (Internal In, External In) | 
                          
                          
                            | 8 ohm | 
                            250W x 2 (Internal In, External In) | 
                          
                          
                            | Frequency Response | 
                            20Hz ~ 40kHz | 
                          
                          
                            | THD 20Hz ~ 30 kHz | 
                            0.08% | 
                          
                          
                            S/N Ratio (Filter : A-waiting, RMS) | 
                            103dB | 
                          
                          
                            | Input Sensitivity | 
                            +4dBm(1.23V) | 
                          
                          
                            | Damping Factor | 
                            £¾350 | 
                          
                          
                            | Crossover Frequency | 
                            1. 90Hz 24dB/Oct 
                              2. 120Hz 24dB/Oct | 
                          
                          
                            | Low cut Filter | 
                            30Hz 12dB/Oct | 
                          
                          
                            | Input impedance | 
                            10k ohm (Balanced XLR) | 
                          
                          
                            | Connectors Input | 
                            2 x Female XLR | 
                          
                          
                            | Connector output | 
                            1. 2 x Male XLR(Mixer out) 
                              2. 1 x Neutrik Type Speakon | 
                          
                          
                            | Power Requirements | 
                            1100 Watts | 
                          
                          
                            | Special Features | 
                            1. Sig LED, Cilp LED, PRT LED 
                              2. Lowest in-rush trodial X-Former 
                              3. Variable speed fan 
                              4.Largest power supply capacitance 
                              5. STK 7 Way Full Circuit Protection 
                              6.AC Out Let for Satellite Active Speaker |