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Nikko EQ-II 6-Band Stereo Graphic Equalizer Made in Japan
Six sliders a channel at 40Hz, 125Hz, 400Hz, 1.25kHz, 4kHz and 12.5kHz, each with 12dB of boost or cut, and a bypass switch for an instant A/B against the unprocessed signal. 0.01% distortion, better than 100dB signal to noise, 10Hz to 30kHz — it adds nothing of its own. Built in Tokyo between 1977 and 1981. Excellent condition, fully tested.
Nikko EQ-500 6-Band Stereo Graphic Equalizer Made in Japan
Six sliders a channel at 40, 125, 400, 1,250, 4,000 and 12,500 Hz, each giving 12 dB of cut or boost in 2 dB steps. Distortion is 0.01%, signal-to-noise better than 100 dB, response 10 Hz to 30 kHz — it adds nothing of its own. Bypass switch and a pre/post-EQ tape loop. Made in Japan. Cosmetic condition fair; fully tested and working.