The Nikko NA-390 II is an integrated amplifier produced between 1979 and 1981. It features a stylish silver and black design and has compact dimensions of 420 x 130 x 275 mm (WxHxD), weighing 4.7 kg. The original price was approximately 170 US dollars or 550 German Marks. It provides versatile connectivity options with two Line In RCA connections and two 6.35mm jack inputs for microphones located at the front. For outputs, it includes two RCA Line Out connections and a 6.35mm headphone output. The amplifier lacks an auto reverse feature but includes Dolby B noise reduction. The NA-390 II allows for separate adjustable control for left and right channels, enhancing user customization. Its technical specifications include a frequency response that supports various tape types: for Type I, the frequency ranges from 30 Hz to 15 kHz; for Type II (CrO2), it goes up to 17 kHz; and for Type IV (Metal), it reaches 18 kHz. The signal-to-noise ratio is 63 dB when using Dolby B. Additionally, the amplifier is part of a series that includes models such as NA-590 II, NA-790, and others, showcasing a range of audio equipment from Nikko.
