BOSE4401 - This RC4136 is the output stage buffer. The preamplifier's
output is made of complementary 2N3569 / 2N3644 pairs (black spherical parts looking
like mushrooms) FET transistors are used for muting the outputs at power on/off,
providing efficient and totaly silent operation. 70's American State of the Art
applied to high-end audio...
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