OverviewThe Sansui SE-9 is a sophisticated stereo “Compu-Equalizer” that combines manual graphic equalization with microcomputer-assisted room-response correction and a real-time spectrum analyzer. Used with its measurement microphone, the unit can analyze the sound reaching the listening position and help compensate for irregularities caused by speakers and room acoustics.That automatic function distinguishes the SE-9 from a conventional slider-only equalizer. The user can still shape the system manually, but the analyzer and computer-controlled circuitry make it possible to approach equalization as a measured setup process rather than simple tone adjustment.Why This Model MattersThe SE-9 comes from an era when manufacturers were bringing increasingly advanced signal processing into domestic hi-fi. Long before modern AV receivers made microphone-based room correction commonplace, Sansui offered a separate analog component built around the same basic goal: measuring the playback environment and improving the system’s frequency balance.Its combination of technical ambition, animated display, and hands-on control gives it more historical interest than an ordinary accessory equalizer.Highlights Microcomputer-controlled stereo graphic equalizer Real-time spectrum-analyzer display Automatic room-response adjustment with measurement microphone Manual equalization capability 10 Hz to 100 kHz specified frequency response High specified signal-to-noise ratio Who It’s ForThe SE-9 is ideal for collectors who enjoy Sansui’s more technically adventurous components, especially when the original microphone is included. It also appeals to listeners who want a visually engaging equalizer with a genuine historical connection to modern room-correction systems.
