| Model  | 
                                      VS-20 | 
                                    
                                    
                                      | Stereo Mode (both channel driven)  | 
                                      Continuous Average Output Per Channel | 
                                    
                                    
                                      | FTC @ THD+N=0.1%, f=20Hz~20kHz  | 
                                      Ch1 | 
                                      Ch2 | 
                                    
                                    
                                      | 8 ohm/Stereo | 
                                      600W | 
                                      600W | 
                                      
                                    
                                      | 4 ohm/Stereo  | 
                                      1000W | 
                                      1000W | 
                                      
                                    
                                      | EIA @ THD+N=1%, f=1kHz  | 
                                       | 
                                    
                                    
                                      | 8 ohm/Stereo | 
                                      650W  | 
                                      650W | 
                                      
                                    
                                      | 4 ohm/Stereo  | 
                                       1030W  | 
                                      1030W | 
                                      
                                    
                                      | Bridge Mono Mode (both channel driven) | 
                                        | 
                                      
                                    
                                      | FTC @ THD+N=0.1%, f=1kHz | 
                                        | 
                                    
                                    
                                      | 8 ohm/Bridge | 
                                      2000W | 
                                    
                                    
                                      | 4 ohm/Bridge | 
                                      2000W | 
                                    
                                    
                                      Power Bandwidth 
                                        (Ref. 1kHz, THD+N=0.1%,+0/-1dB) | 
                                      20Hz~30kHz | 
                                    
                                    
                                    
                                      THD+N 
                                        (Ref. 1kHz,f=20Hz~20kHz) | 
                                      ¡Â0.05% | 
                                    
                                    
                                      Frequency Response 
                                        (Ref. 1kHz, 1watt output, +0/-1dB) | 
                                      20Hz~40kHz | 
                                    
                                    
                                      IMD(SMPTE4:1) 
                                        (60Hz:7kHz, 4:1 Half power) | 
                                        | 
                                    
                                    
                                      | 4-8 ohm/Stereo | 
                                      ¡Â0.1% | 
                                    
                                    
                                      | 8 ohm/Bridge | 
                                      ¡Â0.1% | 
                                    
                                    
                                      Crosstalk 
                                        (RL=8¥Ø, Half power, Att.Max 600¥Ø shunt) | 
                                       ¡Ã64dB, 1 kHz | 
                                    
                                    
                                      Residual Noise 
                                        (20Hz~22kHz LPF,Att.min)  | 
                                      ¡Ã70dB  | 
                                    
                                    
                                      S/N Ratio 
                                        (Filter:A-Weighting, RMS) | 
                                      ¡Ã104dB | 
                                    
                                    
                                      Damping Factor  
                                        (RL=8¥Ø, f=1kHz)  | 
                                      ¡Ã350 | 
                                    
                                    
                                      | Input Sensitivity (Att. max) | 
                                        | 
                                    
                                    
                                      | 4 ohm/Stereo | 
                                       +4.0 dBu | 
                                    
                                    
                                      | 8 ohm/Bridge  | 
                                      +5.1 dBu | 
                                    
                                    
                                      | Voltage Gain  | 
                                      36dB | 
                                    
                                    
                                      | Output Circuitry  | 
                                      H Class 2-Step  | 
                                    
                                    
                                      | Input Impedance | 
                                      6k¥Ø(Unbalance), 12k¥Ø(Balance) | 
                                    
                                    
                                      | Controls | 
                                        | 
                                    
                                    
                                      | Front panel | 
                                      AC Switch,Ch1 and Ch2 gain control knobs  | 
                                    
                                    
                                      | Rear panel  | 
                                      Stereo/Mono Bridge,Clip limiter(option), HPF Switch | 
                                    
                                    
                                      | Connectors | 
                                        | 
                                    
                                    
                                      | Input | 
                                      XLR jack ,1/4" TRS jack  
                                          XLR male Jack(In put Through Out)  | 
                                    
                                    
                                      | Output | 
                                      
                                            Speakon Jack, 5-Way binding Post  | 
                                    
                                    
                                      | Indicators | 
                                      Power(Green),Protect(Red),Clip(Red),  
                                        Mono Bridge(Green) 
                                        Bar Graph In/Out level meters. | 
                                    
                                    
                                      | Protection Circuits | 
                                      1)Short Circuits  
                                        2)Current Limit 
                                        3)DC detection  
                                        4)Thermal  
                                        5)Turn On/Off muting  
                                        6)Power supply shutdown  
                                        7)AC Line fuse  | 
                                    
                                    
                                      | Fan Circuit | 
                                      Two Fans Variable Low Speed(50¡É), 
                                        High speed(60¡É) | 
                                    
                                    
                                      Power Consumption  
                                        (1/3 power) | 
                                       1100Watts | 
                                      
                                    
                                      | DIMENSION | 
                                      480mm X 88mm X 460mm | 
                                    
                                    
                                      | Weight | 
                                      13.92 kg / 30.68 Ibs |