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





Denon DP-30L turntable

Servo controlled Direct-drive Auto-lift turntable
The Denon DP-30L is an electronically controlled direct drive two speed record player complete with integral base and dust cover. The pickup is provided by the user.
Overall performance is exceptionally good; high performance pickups seem to deliver a "little bit extra", and resistance to external shock and vibration is unusually high, even at low tracking forces. No stylus overhang gauge is provided; the user must make the adjustment using a ruler, which can lead to stylus damage. There is really no good reason why a record player of this quality and price is not provided with an overhang gauge, which costs a few pennies, at most.
There are controls for main power, 33/start, 45/start, speed adjust (pitch) and stop. 33 and 45 full time illuminated strobes are provided. The tonearm is manually positioned on the record. At the end of play an optical sensor causes the tonearm to lift and motor to stop. Alternately, pressing stop during play will cause the tonearm to lift and the motor to stop. Pressing a speed selector control restarts the motor and lowers the tonearm. The tonearm has a micro-adjust counterweight that also serves as an 0-3 gram VTF calibrated in 0,1 gram increments. There is a calibrated antiskate. The pickuup mounts in a universal headshell.
Features:
Auto-lift mechanism with non-contact record-end sensor
Newly developed auto arm lifter functions with smoothness and stability
Trim and slim profile with up-front control arrangement
Detects speed with exclusive magnetic recording system
Achieving outstanding anti-howling characteristics through a cabinet made of new compound
Remarkably low (-75 dB) DIN-B rumble -Quiet smooth running AC motor

Specifications
Drive System:  Dirct-drive
Motor:  AC servomotor
Speed:  33-1/3 and 45 rpm
Variable Speed Adjustment Range:  over ±3%
Wow and Flutter:  less than 0,018% WRMS
Signal-to-Noise Ratio:  better than 75 dB (DIN-B)
Starting Time:  less than 1,5 sec to reach 33-1/3 rpm nominal speed
Speed Control System:  Servo controled by frequency detection
Turntable Platter:  Diecast aluminium 300 mm diam.
Weight:  1,5 kg
Moment of Inertia:  190 kg-cm² (including turntable mat)
Tonearm
Type: S-shape static balance with automatic arm lift
Effective length:  220 mm
Overhang:  16 mm
Tracking Error:  within 3°
Stylus Force Range:  0 - 2,5 g/rot (1 division is 0,1 g) direct reading
Acceptable Cartridge Weight:  5 - 10 g (with head shell provided)
Weight of Headshell:  8 g 9excluding screws, nuts and spacer)
Shell Connector: FIA standard 4P connector
Arm Lifter:  Servo controlled by angular control motor
General
Power Supply:  AC 120 V at 60 Hz, AC 200, 220, 240 V at 50 Hz
Power Consumption:  15 W
Dimensions (W x H x D):  450 x 140 x 403 mm ( dust cover closed)
Weight:  9,5 kg 

Nessun commento:

Posta un commento