ESX VMA700.4 Marine 4-Channel Class D Amplifier

ESX VISION marine amplifiers are built for boats and other demanding locations, with IP67 protection for dust and temporary immersion resistance. The VMA700.4 is the 4-channel model in that range and is designed to power front and rear speaker systems where a radio alone does not provide enough output.

The official English ESX page confirms 4 x 115W RMS at 4 ohm, 4 x 175W RMS at 2 ohm and 2 x 350W RMS bridged at 4 ohm. It uses efficient Class D amplification, RCA inputs, auto turn-on, protected controls behind a screwed cover, separate HPF/LPF filtering for channel pairs 1/2 and 3/4, a 2CH/4CH input mode switch and a compact 108 x 51 x 248 mm chassis.

Key specifications

• Marine 4-Channel Class D Digital Amplifier
• 4 x 115/175 Watts RMS @ 4/2 ohm
• 2 x 350 Watts RMS @ 4 ohm bridged
• HPF/LPF 50 - 500 Hz (CH1/2)
• HPF/LPF 50 - 500 Hz (CH3/4)
• Input Mode Switch 2CH/4CH
• Dimensions 108 x 51 x 248 mm
• Efficiency up to 87%

Best used for

Use the VMA700.4 for marine front and rear speaker systems where compact size, IP67 protection and real multi-channel output matter. Check speaker impedance, mounting location and system layout before ordering.