LM381AN National Semiconductor Low Noise Dual Audio Preamplifier 9V-40V DIP-14

LM381N National Semiconductor Low Noise Dual Audio Preamplifier 9V to 40V DIP-14

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TA7405P Toshiba Dual Low Noise Tape Head Preamplifier ZIP-16

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Fairchild 749DHC UA749 Dual Audio Op. Amp./Preamplifier - Rare NOS !

Fairchild - UA739PC - IC, Audio. Dual Audio Operational Amplifier / Preamplifier

TDA4050B Siemens IR PREAMPLIFIER 8 PIN PLASTIC DIP AUDIO COMPRESSOR NOS