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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





Kenwood KD-2055 turntable

The model KD-2055 is carefully designed and manufactured to obtain the basic characteristics that must be completaly assured by the turntable. The turntable  is constructed mainly of turntable cabinet dust cover, turntable platter, tonearm with cardridge and driving motor. Performance of each part used in KD-2055 is very important.

 

The turntable cabinet is an one of essential part for accommodating driving motor, platter, tonearm, etc., which are directly concerned with record reproduction. The most significant matter for high fidelity reprodction is to insulate the cartridge, record, record, tonearm, etc., against harmful internal and external vobrations such as vibration of the driving motor and acoustic feedback from the speaker system.

Meaning of vibration-proof property;

Periodic damping rate is high - periodic damping time is short.

Periodic damping pattern shows a smooth feature without turbulence (if any, shows that there is energy loss due to resonance)

The cabinet of KD-2055 emplys a layer construction of A.R.C.B (Anti Resonance Compression Base) so to speak resin concrete and plywood.

A.R.C.B. is a compressed and formed material, which is mixed with stone grains of 1-5 mm in diameter, calcium carbonate powder, glass powder, and polyester resin. This material is rich in processing accuracy, strength and esthetic value.

 


Specifications

Drive System:  Belt drive

Motor:  4-pole synchronous motor

Speeds:  33-⅓ and 45 rpm

Turntable Platter:  Aluminum alloy die-cast

Platter Diameter:  300 mm (12")

Wow and Flutter:  less than 0,06% (WRMS) ±0,08% (DIN)

Signal-to-Noise Ratio (Rumble): 

JIS :  better than 50 dB

DIN Unweighted :  better than 44 dB

DIN Weighted :  better than 65 dB

Tonearm

Type:  Static-balanced type, S-shaped pipe arm EIA plug-in connector

Effective Arm Length:  215 mm (8-7/16")

Overhang:  9,5 mm (3/8")

Tracking Error:  ±1,5 degree

Stylus Pressure (Variable Range):  0 - 3 grams

Usable Cartridge Weight:  4 to 13 grams (supplied head shell t grams balance weight 4 grams)

Cartridge Type

Moving magnet Type :  V-39 Mk II

Channel Separation:  better than 25 dB (1,000 Hz)

Output Voltage:  3 mV (1,000 Hz, 5cm/sec)

Output balance:  1,5 dB (1,000 Hz, 5 cm/sec)

Frequency Response: 20 - 20,000 Hz

Load Impedance:  50 k Ω

Stylus:  0,5 mil diamond

Stylus Pressure:  2 grams ±0,25

Compliance:  7 x 10¯⁶ cm/ddyne

General

Power Requirements:  AC 110 - 120 V, 220 - 240 V, 50/60 Hz

Power Consumption:  7 watts

Dimensions (W x H x D):  480 x 363 x 146 mm (18-7/8" x 14-5/16" x 5-3/4")

Weight:  11 kg (24,3 lbs)

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