The Hitachi HA-4700 is an integrated amplifier that was produced in the late 1970s to early 1980s. It features a robust construction and aims to deliver high-quality audio performance suitable for various listening environments. The design typically includes a variety of input options for connecting multiple audio sources such as turntables, tape decks, and CD players. Key specifications often include a power output of approximately 70 watts per channel at 8 ohms, with lower distortion levels that enhance overall audio clarity. The amplifier generally supports a wide frequency response, typically ranging from 20 Hz to 20 kHz, ensuring it can reproduce both low and high frequencies effectively. Additional features may involve tone controls for adjusting bass and treble, a loudness switch, and optional phono input for connecting a turntable directly. The HA-4700 is recognized for its durability and performance in delivering clean and dynamic sound, making it a valued component in audio setups of its era.