A840 5-Channel Class D Car Amplifier for Speakers and Subwoofer

Product description

Dual IC & Multi-MOSFET Power Core

IRS2093M/IRS2092S+IRF540N/IRFB4227/ IRF3205

This A840 adopts a professional dual-driver IC scheme: IRS2093M for 4 full-range speaker channels + IRS2092S for dedicated subwoofer channel. Matched with graded IRF540N, IRFB4227 and IRF3205 high-current MOSFETs

Premium chipset delivers ≤0.15% THD+N and -90dBA low noise floor for crisp vocals. Supports 1Ω low-impedance high-power bass. 88% high efficiency and 150A max current offer stable, distortion-free sound for full-car audio upgrades

Aluminum alloy casing, multi-layerprotection

Multiple built‑in protection circuits: over‑current, DC‑offset, overheat, over‑voltage, speaker short‑circuit & reverse‑polarity protection. Heavy‑duty aluminum alloy housing delivers physical protection and enhanced heat dissipation

Power: 110W×4CH+540Wx1CH @2Ω, 80W×4CH+280Wx1CH @4Ω. 800Wx1CH@1Ω

Flexible RCA Input & Remote Control

Features RCA Input. Included remote controller lets you easily adjust subwoofer volume on the fly

Born for Vehicles

Compatible with gasoline vehicles with a supply voltage of 10- 17V

1 Easy Installation

2 Compatibility

Independent LPF & Bass Boost for Subwoofer Channel

5th sub channel: independent LPF & bass boost for customized low frequencies

1 Gain control panel

2 What’s in the Box?

One Amplifier for Your Speakers and Subwoofer — Build a complete car audio system with four speaker channels and a dedicated fifth channel for a subwoofer. Designed for drivers upgrading front and rear door speakers while adding bass, with fewer separate amplifiers to install
Four Channes of RMS Speakers Power — Channels 1–4 deliver 110W x4 RMS at 2 Ohm or 80W x4 RMS at 4 Ohm. Power compatible component or coaxial speakers for front and rear sound. Match each speaker’s impedance and RMS power handling to the amplifier output; channels 1–4 require a minimum 2 Ohm load per channel
Dedicated Subwoofer Channel, Stable at 1 Ohm — Channel 5 delivers 800W x1 RMS at 1 Ohm, 540W x1 RMS at 2 Ohm, or 280W x1 RMS at 4 Ohm. Choose the final wired impedance that matches your subwoofer setup. The 1 Ohm rating applies only to channel 5, not to the four speaker channels
Efficient Class D Design — Built around IRS2093M and IRS2092S amplifier drivers, the Class D design offers up to 88% efficiency. An aluminum alloy housing helps dissipate heat and shields internal components. Designed to operate within a 10–17V DC supply range
Six Protection Functions & Fused Power Input — Includes over-current, DC offset, thermal, over-voltage, speaker/short-circuit, and reverse-polarity protection, plus a built-in 150A fuse. An external 160A ANL fuse is recommended. Size power and ground cables for the installation’s current demand and cable length, following the product manual

Product summary

shift
+
opt
+
D