Nakamichi Receiver1

Commentary

A receiver equipped with a unique harmonic time alignment amplifier.

The amplifier section is designed using Nakamichi's original harmonic time alignment theory.
The Harmonic Time Alignment Theory was proposed by Steve Kalison, a former researcher at the Nakamichi America Research Center. The theory states that "sound is good when the music signal and its harmonic distortion are aligned in time." This is related to the phenomenon that an amplifier with more distortion sometimes produces better sound than an amplifier with less distortion.
The amplifier circuit used in the Receiver1 was developed based on this theory. It uses a wide-band, low-gain open loop design to keep the amount of NFB in the audio band constant. In addition, the amount of NFB itself is suppressed slightly, and a method to adjust the fundamental sound and distortion components correctly in time is applied.
In addition, it is equipped with a power amplifier with excellent current supply capability to support low-impedance speakers.

The power supply section employs a multi-regulated power supply system that independently regulates each stage of the amplifier, tuner section, display circuit, and logic circuit to prevent interference between sections.
The ground circuit also uses a unique isolated ground system to shut out interference noise around the ground line.

The tone control circuit uses a circuit that can adjust both ends of the frequency band without changing the characteristics of the middle band.
This circuit can be lost.

A quartz-lock synthesizer is used for the tuner section.
This circuit uses a multiplex stage with a precision ceramic oscillator to ensure high selectivity, and an RF amplifier with a low-noise dual-gate MOS FET to provide high sensitivity and excellent reception performance that is robust against overloads.
In addition, an isolation buffer is provided at the tuner output stage to prevent adverse effects of high-frequency noise on the audio signal.

FM/AM10-station preset memories are installed.

A motor-driven volume is used to prevent the deterioration of sound quality that occurs with electronic volume, while enabling volume adjustment by remote control.

The Receiver1 has a video input / output connector in addition to an audio input / output connector.
It also has a separate output selector for playback and recording.

Equipped with a wide-band video buffer amplifier.

Equipped with variable loudness control.

Built-in pre-out / main in terminal.

Equipped with high-speed protection circuit.

It comes with a system remote control that allows you to operate the connected Nakamichi component as well as the receiver.

By using the optional remote sensor RS-7, remote control is possible from a room other than the room in which the system is placed.
Up to three RS-7 units can be connected, and the same remote controller as the included wireless remote controller is sold separately and can be added for use in a separate room.
In addition, it is equipped with a remote selection function of speaker A/B so that you can select two pairs of speakers to sound.

Model Rating

Type	Stereo receiver
Amplifier Unit
Rated Output (Double-channel Drive, 20 Hz to 20 kHz, THD0.1%)	80W + 80W (8 Ω)
Power bandwidth	5 Hz to 40 kHz
Maximum output current	18A peak (single-channel)
Total Harmonic Distortion Factor (8 Ω, Rated Output, 20 Hz to 20 kHz)	Not more than 0.1%
S/N ratio (IHF A-WTD, input short)	Phono MM : 78 dB or more CD/Video/Tape : 100 dB or more
Tone control	Bass : ± 10 dB (20 Hz) Treble : ± 10 dB (20 kHz)
Loudness (maximum correction, 1 kHz, -40dB)	+ 20 dB at 20 Hz, + 6 dB at 20 kHz
FM Tuner Section
Practical sensitivity (IHF)	Mono : 11dBf/0.97 μ V
50 dB S/N sensitivity	Mono : 14.7dBf/1.5 μ V Stereo : 37.5dBf/20.5 μ V
Harmonic distortion factor (1 kHz)	Stereo : not more than 0.07%
Effective selectivity (± 400 kHz)	65 dB or more
<General>
Power outlet	Switched : 2 systems, up to 200W total
Pwer	100 VAC, 50Hz/60Hz
Power consumption	390W maximum
External dimensions	Width 430x Height 100x Depth 370 mm
Weight	Approx. 11.5 kg
Attachment	System Remote Control Receiver1 Remote Control
Sold Separately	Remote Sensor RS-7 (¥ 27,000) System Remote Control Receiver1 Remote Control