The RCA Low Noise Audio Preamplifier, MI-3523, is a fully transistorized unit that exhibits extremely low output noise and distortion characteristics, and utilizer transformer coupling in the signal input and output circuits. It is a compact plug-in unit designed for use in new or existing studio equipment consoles, or custom built audio systems, primarily as a microphone preamplifier, although it may also be used as an isolation or bridging amplifier.
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