Nautical Series 4-Channel Class SQ Car Amplifier is designed for boaters, MB Quart NA-3604 amplifier is geared for harsh outdoor environments. With a protected circuit board, a sealed salt-water resistant heat sink, and hardware ensures your amp will stand up to salt, spray, high temperatures and high volume levels for seasons to come.
General Features:
  - RMS Power Rating:
- 4 ohms: 60 watts x 4 chan.
- 2 ohms: 90 watts x 4 chan.
- Bridged, 4 ohms: 180 watts x 2 chan.
- Pulse Width Modulated MOSFET power supply
- LED power (green) and protect (red) indicators
- Variable Bass Boost (0 to +9 dB bass boost at 45 Hz)
- Soft start turn-on
- 4/3/2 or Mono channel operation
- Preamp RCA outputs to daisy chain multiple amps
- 3-way protection circuitry (thermal, overload, and speaker short protection)
- Heavy duty aluminum alloy heat-sink
- Input sensitivity:
- Level: 200mV-6V
- Variable high-pass filter (250-4000 Hz)
- Variable low-pass filter (40-250 Hz)
- Dimensions: 9-1/2"W x 13-11/16"L x 2-1/4"H
                            
                                
                                            
                                                | Additional Information | 
                                            
                                                | Amp Channel | 4 Channel | 
                                            
                                                | Amp Signal to Noise Ratio | 93 dB | 
                                            
                                                | Brand | MB Quart | 
                                            
                                                | Car use | Yes | 
                                            
                                                | Color | Silver | 
                                            
                                                | Item Weight | 8.85 | 
                                            
                                                | Manufacturer | MB Quart | 
                                            
                                                | Manufacturer Part Number | NA3604 | 
                                            
                                                | UPC | 806576221883 | 
                                
                         
                                                                                                        
                                
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