The Fosi Audio ZA3-48V is a cutting-edge 2.0 channel amplifier that supports both stereo and mono modes for versatile use, delivering up to 155W per channel in stereo and a peak of 235W in mono. When two units are combined in mono, they create a high-powered audio system that elevates your listening experience. It features balanced combo inputs compatible with XLR and 1/4" TRS connectors to minimize interference, along with a 12V trigger input for synchronized power control. Powered by the TPA3255 Class-D amplifier chip and premium Japanese and German components, it achieves excellent clarity with low distortion and noise. Its upgraded cooling system includes a larger chassis, side vents, and dust covers to maintain consistent high-power output. The ZA3 also supports op-amp rolling with five swappable op-amps for left/right channels, balanced input, and subwoofer output, allowing precise tonal adjustments with various DIP8 dual op-amps. Included are the ZA3 amplifier, power adapter tailored to your region, user manual, a 24-month warranty, and dedicated customer support.