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NJM072S / NJM072SP dual J-FET input...
Dark Blue Switch Cap
Roland Slider cap knob
High-quality 4558 dual operational amplifier IC, selected and tested for reliable performance in vintage synthesizers, drum machines, and audio equipment. Fully compatible with a wide range of classic gear including Yamaha DX7, Korg Polysix, Wavestation, Lambda, EX7, DS‑55, Moog Liberation, and more. Ideal for restoring audio circuitry.