The Brigmton SA-1 is a vintage real-time frequency spectrum analyzer designed primarily for audio enthusiasts to visually monitor sound frequencies and calibrate room acoustics. It is commonly used alongside graphic equalizers to provide visual confirmation of audio adjustments. Key Features and Specifications Visual Display: Features a 10-band illuminated LED display with 120 separate LEDs (12 per band) and 12 LED Average Response indicators. Measurement Tools: Includes a built-in pink noise generator and originally shipped with a high-quality electret condenser microphone specifically for pink noise measurement. Operational Modes: Slow Mode: Dampens the display for a smoother average reading. Peak Hold: Freezes the highest frequency peaks for easier analysis. Connectivity: Features line inputs and direct outputs on the rear panel, allowing it to be integrated into a standard stereo setup.