The McIntosh MC2155 is a solid-state stereo power amplifier that was designed to deliver high-quality audio performance. Introduced in the mid-1970s, the MC2155 is known for its robust construction and powerful output capabilities. It features a unique design with an eye-catching blue watt meter for visualizing output levels. The amplifier is capable of delivering 110 watts per channel into 8 ohms, with dynamic power outputs of 220 watts into 4 ohms and 440 watts into 2 ohms. It utilizes McIntosh's patented Power Guard technology to prevent distortion and clipping, enhancing the listening experience while protecting the speakers. The amplifier is equipped with various input options, including both balanced and unbalanced inputs, allowing for versatile connectivity with other audio components. The chassis is typically adorned with the classic McIntosh styling, featuring an aluminum front panel and illuminated logos. Overall, the MC2155 is appreciated for its sound quality, reliability, and the prestigious brand heritage behind it.