The Technics SH-GE90 is a vintage Digital Sound Processor (DSP) and graphic equalizer manufactured by Technics between 1992 and 2002. Praised for its robust sound-shaping features and visual flair, it is often sought after by vintage audio enthusiasts to add to their hi-fi system. Key features Digital sound processing (DSP): The SH-GE90 uses DSP to provide precise, repeatable, and memory-driven sound adjustments. Built-in equalizer: Includes a 24-band adjustable equalizer with a control range of ±12 dB. This allows for detailed customization of the audio frequency response. Parametric EQ: As a digital parametric equalizer, it can selectively boost or cut three of its 24 available center frequencies. The "Q factor" for this effect can be set to a wide (1.8) or narrow (0.7) range. Preset modes: Comes with several preset EQ modes, including "Heavy," "Clear," "Soft," "Vocal," and "Car-Stereo". Sound field effects (Spatializer): Features a spatializer function that simulates different listening environments. Presets include "Hall," "Live," "Disco," "Church," "Stadium," and "Theater". Karaoke functions: Designed with karaoke features, including dual microphone inputs with volume controls, voice mute, key control, and echo effects. Visual spectrum analyzer: A standout visual feature is its animated spectrum analyzer display, which uses LED/VFD bars to provide a real-time visualization of the audio frequency. Jog dial: A user-friendly jog dial allows for easy navigation and adjustment of the unit's sophisticated functions. Connections: Includes tape loop connections (In/Out, Play/Rec) for integration with other components. General: Manufacturer: Technics Model: SH-GE 90 Type: Digital Equalizer Years of manufacture: 1992 - 2002 Color: Black Remote control: no Power consumption: Dimensions: 430 x 92 x 290 mm Weight: 3 kg Original price: approx.: 499 DM Connections: Number of inputs: 4 Line-in Tape-in 2 Mic-in Number of outputs: 2 Tape-out Line-out Technical data: Adjustable frequency bands: 24 Control range: +/- 12 dB Frequency response: Signal-to-noise ratio: Distortion factor: 0.08% High-quality sound processor with digital signal processing (DSP) Digital parametric equalizer for selective boost and cut of three of 24 center frequencies. Six presets with standard frequency responses (Heavy, Clear, Soft, Vical, Headphone-Stereo, Car-Stereo) Six presets with sound field effects (hall, live, disco, church, stadium, theatre) With karaoke/voice mute button, convenient pitch control and reverb/echo effects Two microphone inputs with level controls Spectrum analysis/frequency response display with three display modes Easy control of sophisticated functions via easy-to-grip jog dial Distortion factor at nominal output voltage: 0.08 % (1kHz) External voltage spacing: 86dB Band level control: + 12 dB, - 12 dB (2 dB steps) Center frequencies: LOW (31.5 Hz, 40 Hz, 50 Hz, 63 Hz, 80 Hz, 100 Hz, 125 Hz, 160 Hz, 220 Hz). HIGH 1, 2: (315 Hz, 450 Hz, 630 Hz, 800 Hz, 1 kHz, 1.25 kHz, 1.6 kHz, 2.2 kHz, 3.15 kHz, 4.5 kHz, 6.3 kHz, 8 kHz, 10 kHz, 12.5 kHz, 16 kHz)