The McIntosh MAC4280 is an integrated amplifier that combines the features of a preamplifier and power amplifier into a single unit. It typically offers multiple channels and built-in technologies for achieving high audio fidelity. The unit is designed with a range of inputs to accommodate various audio sources, as well as additional features such as tone controls and meters for monitoring signal levels. The MAC4280 is known for its sturdy construction and unique aesthetic, which aligns with McIntosh's distinctive design language.