All-in-One System Power Without Compromise

The ARC Audio X2 850.5 is the ideal solution for audio enthusiasts and professional installers looking to build an entire system with a single amplifier. Designed to deliver both space savings and exceptional sound, it provides four channels of full-range output for components or coaxials — plus a dedicated 400-watt subwoofer channel — all from one compact chassis.

Whether you’re powering a 2-way passively filtered front stage with rear fill or simply running four coaxials speakers, either with the addition of an add-on subwoofer, the X2 850.5 eliminates the complexity and cost of multiple amplifiers. With reduced wiring, fewer connections, and a smaller footprint, it streamlines installations while maintaining the sonic precision ARC Audio is known for.

Balanced differential inputs across all channels ensure compatibility with both aftermarket systems and OEM factory radios, including those without traditional RCA outputs. This makes the X2 850.5 perfect for cost-effective upgrades in modern vehicles where retaining the factory source unit is a must.

Built on ARC’s installer-first Level 1 cosmetic platform, the amp features a rotatable CNC-machined badge for seamless mounting orientation. Under the removable top panel, you'll find intuitive access to crossover controls, gain settings, and connections — keeping your installation clean, serviceable, and professional.

If you’re after high-end results with fewer components and a clean layout, the X2 850.5 offers a complete, powerful solution — all in one.