Stadium provides longer delays and more reverberation, whereas Natural (for use with programs containing considerable reverberation) adds mainly an array of discrete signal delays rather than reverberation. The Hall environment simulates the effect of a typical concert hall by adding reverberation to the delayed signals supplied to the surround speakers. These include Dolby Pro Logic for compatibly encoded video or audio programs and three synthesized environments identified as Natural, Hall, and Stadium. The Source Direct button bypasses all surround and response-modifying circuits, routing the selected program through the volume control and directly to the front-channel power-amplifier sections.īelow the source selectors, a group of smaller buttons controls the receiver's four spatial-modification circuits. Smaller red or orange characters show the signal-processing mode, tuner status and relative signal strength, and tape (audio and video) source and dubbing path where applicable.īelow the window, a row of large pushbuttons selects the program source and dubbing configuration. The tuned frequency, preset channel number, and station call letters (when programmed by the user) appear in large orange characters against a black background. The AV-1's front-panel display window shows its complete operating status. All other operations, including station selection, audio level, tone-control adjustment, and the like, are done with pushbuttons. The receiver's only other control knob is a small input-balance adjustment for setting up the Dolby Pro Logic decoder. The AV-1's large front-panel volume knob is driven by a motor when operated from the supplied remote control. The surround-channel amplifiers are rated at 30 watts apiece, and the center-channel amplifier is rated at 50 watts, all at 1 kHz into 8 ohms with no more than 0.1 percent THD. A switch on the rear of the receiver enables safe full-power operation into 4-ohm loads. The front (main) power amplifiers are rated at 100 watts per channel into 8 ohms from 20 Hz to 20 kHz, both channels driven, with less than 0.1 percent total harmonic distortion (THD). The AV-1 has complete signal-switching facilities for selecting and controlling tuner, CD, and phono sources, two audio tape decks, two VCR's, and a videodisc player, including inputs and outputs for both composite-video and S-video signals. It contains an AM/FM digital frequency-synthesis tuner, a preamplifier, digital signal processing (DSP) circuits for simulating several acoustic environments, and five power amplifiers. The AV-1 is Nakamichi's most powerful audio/video receiver.

Nakamichi av 500