ESX SX800.4 4-Channel Class D Amplifier

The ESX SX800.4 is a SIGNUM SX 4-channel Class D amplifier for powerful front and rear speaker systems, active 2-way setups or a 3-channel speaker-and-subwoofer layout. The official ESX page confirms 4 x 110W RMS at 4 ohm, 4 x 200W RMS at 2 ohm and 2 x 400W RMS bridged at 4 ohm.

It uses a compact die-cast aluminium heatsink and includes RCA inputs and outputs, high-level inputs with EPS, auto turn-on, start/stop readiness, front and rear HPF/LPF filtering, rear bass boost, input selector and a compact bass remote controller.

Key specifications

• 4-channel Class D digital amplifier
• 4 x 110/200W RMS at 4/2 ohm
• 2 x 400W RMS at 4 ohm bridged
• HPF/LPF 50 - 5000 Hz on front and rear channels
• Rear bass boost 0 - 12 dB
• Input selector 2CH/4CH
• Compact bass remote controller included
• Dimensions 140 x 44 x 225 mm
• Efficiency up to 90%

Best used for

Use the SX800.4 when you need a compact 4-channel amplifier for front/rear speakers, an active 2-way system, or a 3-channel setup with a bridged subwoofer channel.

Setup note

Speaker impedance, bridge mode and filter setup matter on multi-channel amplifiers. If you are unsure how to wire this into your vehicle, send us your system details by WhatsApp or email before ordering and we will help check the setup.