The Nikko Beta I is a stereo preamplifier that was produced in the late 1970s. It is known for its comprehensive features and solid build quality. The design emphasizes functionality, with a focus on providing clear, accurate audio reproduction. It includes various inputs for connecting multiple sources, such as phono, tape, and other line-level devices. The preamplifier includes tone controls for adjusting bass and treble frequencies. Additionally, it features a loudness switch to enhance low-level listening and utilizes a range of output options to connect with power amplifiers or other audio equipment. The layout of the front panel is user-friendly, with clearly labeled knobs and switches, contributing to its practical design. Typical specifications include a frequency response of 10 Hz to 100 kHz, total harmonic distortion (THD) around 0.05%, and a signal-to-noise ratio greater than 90 dB, making it capable of producing high-quality audio with low noise levels.