ESX VMA700.4

The ESX VMA700.4 from the VISION Marine Series is a powerful and compact 4-channel digital amplifier designed specifically for use on boats and watercraft. Thanks to state-of-the-art Class D technology, the amplifier combines high output power with an efficiency of up to 87% and a particularly compact design.

With an output of up to 4 × 175 watts RMS at 2 ohms, the VMA700.4 is ideal for driving high-power marine speaker systems. Alternatively, the four channels can be bridged to form two channels, each delivering 350 watts RMS at 4 ohms.

The rugged design with an IP67 protection rating protects the electronics from dust and temporary submersion. All adjustment controls and crossovers are located behind a screw-mounted protective cover. Adjustable high-pass and low-pass filters allow for flexible adaptation to different speaker configurations.

Thanks to its compact size, automatic power-on function, and switchable 2- or 4-channel RCA inputs, the amplifier can be flexibly integrated into existing marine audio systems.

Technical Specifications

General Characteristics

• Model: ESX VMA700.4

• Product Line: VISION Marine

• Amplifier Type: 4-Channel Digital Amplifier

• Circuit Technology: Class D

• Number of channels: 4

• Operating voltage: 12-volt vehicle electrical system with negative ground

• Protection rating: IP67

• Efficiency: Up to 87%

• Automatic power-on function: Yes

• Input selector switch: 2CH / 4CH

• RCA inputs: 4, via cable connectors

• Adjustment controls and crossovers behind a screw-mounted protective cover
  
  

RMS Output Power at 14.4 Volts

• 4 × 115 watts RMS at 4 ohms

• 4 × 175 watts RMS at 2 ohms

• 2 × 350 watts RMS bridged at 4 ohms
  
  

Audio Characteristics

• Frequency response (−3 dB): 10 – 32,000 Hz

• Signal-to-noise ratio: Over 98 dB

• Damping factor: Over 50

• Total Harmonic Distortion (THD+N): Less than 0.029%

• Input sensitivity: 0.4–5.6 volts
  
  

Crossover Filters, Channels 1/2 (Front)

• Crossover modes: Full / HP / LP

• High-pass filter (HPF): 50–500 Hz

• Low-pass filter (LPF): 50–500 Hz

• Adjustable crossovers
  
  

Crossover Channels 3/4 (Rear)

• Crossover modes: Full / HP / LP / BP

• High-pass filter (HPF): 50–500 Hz

• Low-pass filter (LPF): 50–500 Hz

• Bandpass mode (BP): Supported

• Adjustable crossovers
  
  

Connections and Power Supply

• RCA preamp inputs: 4

• Input configuration: 2-channel or 4-channel

• Automatic Power-On: Supported

• External device fuse: 1 × 60 A

• Fuse included in the package
  
  

Dimensions

• Width: 109 mm

• Height: 51 mm

• Length: 248 mm