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About the PA-1
The Nakamichi PA-1 is a Japan-built 5-channel home-theater power amplifier rated at 100 W per channel into 8 ohms with all five channels driven, intended for A/V and surround sound applications. It provides RCA inputs for front left/right, center (mono), and rear left/right channels, speaker binding posts that accept bare wire or banana plugs, a 12V remote trigger input and output for power control, and a standard IEC power inlet. The design is based on Nakamichi's Harmonic Time Alignment amplifier topology used in this series, offering wideband, low-distortion performance tailored to multi-channel use. Enthusiast teardowns report a robust internal build with a large R-core power transformer and approximately 60,000 uF of total filter capacitance, supporting high current delivery and stable operation across all channels, although these figures are from expert-derived sources rather than original consumer-facing literature. The PA-1 is known among users for clean, dynamic sound in 5.1 home-theater systems.
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