What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

Micro Seiki DQX-500

350 mm diameter platter with 600 kg×cm² moment of inertia and quartz lock servo PLL DC motor.
The platter used for the DQX-500 features an extremely high moment of inertia of 600 kg×cm², and this helps suppress fluctuations in the pulsive mechanical amplitude caused by the sound grooves on the record. As far as the static characteristics are concerned, the quartz lock servo system guarantees an outstanding control speed stability. However, it cannot be said to control perfectly the rendom transient load generated by the reproduction of the record sound. In particular, turntables rely for the most part on their platter’s moment of inertia to deal with disturbances in the high frequency range components for an overall improvement in the characteristics. Therefore, based on the basic servo control system, the static load fluctuations are absorbed by the quartz lock PLL system, and the dynamic load fluctuations are improved by the moment of inertia.

Stand-by lamp for easy rated speed checks .
The quartz lock servo PLL system provides a rotational speed with no deviation from the rated 33-1/3 rpm and 45 rpm speeds. There is no need for a strobe and so this has been abandoned in favor of a simple design.When the platter with its high moment of inertia reaches the rated speed the stand-by lamp goes off. This  action allows you to check whether or not the platter is revolving at the right speed.

Resonance-free monocoque frame.
The phonomotor and tonearm feature a sturdy integrated construction together with the metal frame composed of a three-legged configuration. This means that the turntable functions as a mechanical circulation system so that it is hardly affected at all by external vibration.
Micro's engineers got down to the bottom of the resonance modes caused by the conventional box-shaped construction and came up with a crystal-clear reproduced sound. This is design which is compact achieves an excellent weight balance and features absolutely no dead space. The motor shaft bearings are coupled to the frame with the reinforcement and there is plenty of mechanical strength to support the high inertia which accompanies the rotation of this heavyweight platter. All these features make for an extremely distinct sound image.

Outer power transformer power supply for an improvement in the signal-to-noise ratio.

In order to handle the very faint signals which are transmitted through the cartridge turntables have been beset with the problem of induction caused noise from the AC power source. If you use a moving coil cartridge, the flux generated by a power transformer, for instance can sometimes be the cause of hum. This is why the DQX-500 features a separate power transformer. It is designed to accommodate all the controls. You can therefore use the transformer as far away from the cartridge and tonearm as possible.

Turntable Section
Drive System:  Direct Drive
Motor:  Quartz Locked PLL DC servo motor
Speeds:  33 and 45 rpm
Turntable Platter:  350 mm (13¾ inch) diameter, aluminum diecast platter
Platter Weight:  2,6 kg (5,72 lbs)
Moment of Inertia:  600 kg/cm²
Wow and Flutter:  less than 0,02%
S/N Ratio:  More than 63 dB (JIS) 75 dB (DIN-B)
Power:  117 V, 60 Hz (USA , Canada); 220 - 240 V, 50 Hz (other areas)
Power Consumption:  5 W
Tonearm Section
Type:  Dynamic balance
Effective Length>:  237 mm (9 inch)
Overhang:  15 mm (19/32 inch)
Maximum tracking error:  Less than 1,5⁰
Usable cartridge weight:  4 - 12 g (0,14 - 0,42 oz)
Range of tracking force adjustment:  0 - 3 g
Dimensions (W x H x D):  410 x 139 x 350 mm (16  x 5½ x 13¾ inch)
Weight:  7,0 kg (15,4 lbs)

Micro-Seiki MA-707 tonearm description

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