SANSUI XR-Q5
¥ 59,800 (around 1982)
Commentary
A full auto player that inherits the basic performance of the XR-Q7II as much as possible and is equipped with an MC cartridge.
In order to reduce the torsional vibration of the cabinet caused by the direct drive system, we have adopted an original silent sink rotor.
In the silent sync rotor system, a sync rotor is mounted on the lower part of the system, which does not move when the motor is rotating constantly, but moves only to remove the reaction when there is torque fluctuation. This absorbs the reaction between the motors and reduces the rotational vibration level of the cabinet to less than 1/4, eliminating torsional vibration.
The drive motor is an FF (Friction Free) coreless motor that solves the problems of conventional coreless motors.
The stator of this motor is made of non-magnetic material, and the yoke rotor, which forms the magnetic circuit, is fixed to the spindle. Therefore, by rotating exactly in the same way as the rotor magnet, there is no suction force between the stator and the magnet, and no pressure other than the weight of the rotor is applied to the bearing.
Since the yoke rotor, which forms the magnetic circuit, rotates together with the magnet, ideal operation without magnetic hysteresis or eddy current is possible. In addition, smooth rotation is possible by adopting a linear drive system with sine wave that minimizes torque irregularities.
When the turntable is removed and the spindle is rotated by hand, this FF coreless motor rotates more smoothly and smoothly than conventional coreless motors.
Quartz lock servo system is used for the servo circuit.
D. O. B. (Dynaoptimum Balanced) tone arm (optimum support point tone arm) is adopted for the tone arm.
This arm was developed by approaching the mechanism of vibration transmission from the angle of theoretical analysis of the position of the fulcrum. By placing the pivot axis on the dynamic fulcrum, vibration picked up from the needle tip is prevented from being transmitted to the pivot, and external vibration is prevented from being transmitted to the needle tip.
Also, a brass straight type arm pipe is adopted.
The connector uses an ADC-type universal system.
The cartridge is a dual-coil MC cartridge with an independent power generation mechanism for left and right channels.
Although this cartridge is MC type, the needle can be changed.
Equipped with a computer-controlled photoelectric detection type and contactless full auto mechanism.
This system has no adverse effect on the basic performance of the arm such as deterioration of initial motion sensitivity. In addition, it has a safety design to protect the needle tip, record, and auto mechanism. If the tone arm is intentionally stopped during auto operation or if there is a mechanical problem, all operations will stop after 20 seconds.
The cabinet is a wooden cabinet with a thick mirror finish using high-density material.
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Model Rating
| Type | Record player |
| Drive system | Electronically controlled direct drive |
| Motor | Quartz PLL servo FF coreless motor |
| Number of revolutions | 33 1/3, 45 rpm |
| Turntable | 30.8 cm, 1.5 kg (including rubber sheet) |
| Wow flutter | 0.012% or less (WRMS) |
| Signal-to-noise ratio | 78 dB or more (DIN-B) |
| Start-up characteristic | 2 seconds at33 1/3rpm |
| Rotational speed deviation | ± 0.002% |
| Tone arm | Static balance type optimum support point system straight arm |
| Effective length | 245mm |
| Overhang | 16mm |
| Cartridge | MC Type (AT-3100S) |
| Frequency characteristic | 20 Hz to 23 kHz |
| Output voltage | 0.4 mv (1 kHz, 50mm/sec) |
| Load impedance | 100 Ω |
| Proper needle pressure | 1.7g ± 0.3g |
| Needle tip | 0.6 mil Diamond Needle (ATN-3100S) |
| Full auto mechanism | Auto lead in Auto return Autorepeat With Manual Lifter |
| Rated power consumption | 8W |
| External dimensions | Width 490x Height 178x Depth 385 mm |
| Weight | 9.5kg |