Nakamichi CassetteDeck1

Commentary

This cassette deck has been developed as a reference machine for the new era that inherits the tradition of Nakamichi.

It uses a 3-head system in which each of erasure, recording and playback is received by a dedicated head. The shape, material and gap width of the head can be optimized respectively, and characteristics can be pushed to the limit.
The core of the recording and reproducing heads is made of Crosalloy, which has excellent sound quality and magnetic characteristics close to the ideal. In addition, by adopting a special structure, the head is prevented from losing one side and has a long life.
Top grade oxygen-free copper (OFC) wire is used for the head coil.

It is equipped with a new mechanism for manually adjusting the azimuth of the playhead so that you can determine the point at which the best high-frequency response can be obtained during playback.

The mechanism employs a frequency distributed closed loop double capstan.
In this system, two capstan and flywheel with different diameters are adopted in order to avoid the increase of modulation noise due to the overlap of resonance frequencies. In addition, vibration absorbing material is used for the head base assembly to suppress vibration and eliminate the adverse effect on sound quality.
This structure eliminates the need for a tape pad attached to the cassette to stabilize the head touch. The unique mechanism of the tape pad lifter prevents modulation noise caused by the tape pad.

High-quality elements are used for the recording and playback amplifiers, and dual-monoconstruction is used to eliminate interference between channels. In addition, coupling capacitors, which cause distortion, are eliminated in the DC amplifier configuration.
The recording amplifier circuit is pure A-class and has high stability. For each tape position, an LR-independent adjustment circuit for recording level and bias level at a total of 12 points draws out the capacity of the tape.
The read amplifier circuit consists of only discrete elements and is integrated with the transport side read head assembly to reduce signal transmission loss caused by cable routing.

The power supply circuit uses a multi-regulated power supply system that supplies power independently for each stage and section to prevent interference such as noise contamination.

It includes a microprocessor-controlled motor drive silent mechanism, tape sag prevention, bias fine adjustment volume, program check, and MPX filter with defeat.

Equipped with Dolby B/C NR as noise reduction.

Equipped with timer recording / playback mechanism.

Model Rating

Type	Stereo cassette deck
Heads	Recording : R-3L Recording Head Playback : P2H-3L playhead Erasing : E-4F erase head
Motor	Capstan Drive : DC Servo Motor For Reel Drive : DC Motor Cam Drive : DC Motor
Wow and flutter	± 0.06% or less WTD Peak (EIAJ) 0.035% or less WTD RMS
Frequency characteristic	20 Hz to 21 kHz ± 3 dB (recording level -20dB, TypeI/II/IV, EIAJ)
S/N ratio (70 μ s, TypeIV)	DolbyNR B on : 66 dB or more (400 Hz, 3% THD, IHF A-WTD RMS) DolbyNR C on : 72 dB or more (400 Hz, 3% THD, IHF A-WTD RMS)
Overall strain rate	0.8% or Less (400 Hz, 0 dB, TypeIV) 1.0% or Less (400 Hz, 0 dB, TypeI/II)
Channel separation	37 dB (1 kHz, 0 dB, EIAJ)
Crosstalk	60 dB or More (1 kHz, 0 dB, EIAJ)
Erasure rate	60 dB or More (100 Hz, + 10 dB)
Bias frequency	105kHz
Input Sensitivity / Impedance	Line : 50mV/40k Ω
Output Level / Impedance	Line : 0.5V/2.2k Ω (400 Hz, 0 dB, maximum output level volume) Headphones : 5.0mW/8 Ω (400 Hz, 0 dB, maximum output level volume)
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	25W max.
External dimensions	Width 430x Height 100x Depth 320 mm (EIAJ)
Weight	Approx. 5.4 kg