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





Sharp RT 2500 cassette deck

Stereo Cassette Deck with Dolby Noise Reduction System

Every sound in the RT-2500 is shaped just the way you like it. The unique CrO₂/Normal tape selector switch utilizes all CrO₂/Normal tape charateristics. It brings out the best in high densitiy recording and assures unsurpassedS/N ratio.the newly developed 2-colored LED peak level indicator shows you exactly when the peak recording level is reached, and also indicates the proper recording level. So easy and so convenient. But that's not all. The built-in Dolby Noise Reduction system eliminates the last trace of undesirable hiss noise caused by magnetic substancies. And the Full Automatic Stop mechanism disengages the drive mechanism automatically when the tape reaches an end. A truly feature packed stereo cassette tape deck.
Specifications
Type: AC operated Solid-State, 4-track, 2-channel Stereo Cassette Tape Deck with built-in Dolby Noise Reduction System
Tape Speed:  1-7/8 ips
Track:  4-track2-channel stereo
Motor:  DC servo motor
Heads:  Long life ultra-hard permalloy haead for Rec/Play
Ferrite head for Erase
Input jack:
Microphone :  0,1 mV/600 Ω
Line :  50 mV/85 k Ω
Output jacK
Line :  410 mV/50 k Ω
Headphones :  90 mV/8 Ω
Bias System:  AC bias
Erase System:  AC erase
Bias Frequency:  84 kHz
Level Indication:  VU meter , LED 2-colored peak level indicator
Wow and Flutter:   0,13% WRMS
F.F. and Rewind Time:  75 sec for C-60 cassette
Frequency Response:
CrO₂ Tape :  45 - 14,000 Hz ±3 dB
Normal tape :  45 - 12,000 Hz ±3 dB
Signal-to-Noise Ratio
58 dB (Dolby noise reduction "ON")
52 dB (Dolby noise reduction "OFF")
Distortion:  1,5% at 0 VU
Semiconductors:  4 ICS; 6 Transistors plus 16 Aux transistors; 35 Diodes, 1 LED, 1 SCR
Power Source:  AC 120 V, 60 Hz
Power Consumption:  18 W
Dimensions (W x H x D):  16-7/8" x 4-1/2" x 10-1/2"
Weight :  13 lbs

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