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

Akai CS-705D

Akai's all new front loading type cassette deck with Dolby NR system
Front cassette loading, front control convenience. IC equipped Dolby NR system.electronically controlled DC motor. Super hard permalloy head. Tape Selector Sswitches for use of high grade tape.
Track System:  4-track, 2-channel stereo system
Tape:  Philips type cassette tape
Tape Speed:  1-7/8 ips.
Wow and Flutter:  less than 0,08% WRMS (NAB; 0,24% (DIN 45507)
Frequency Response: 
Low Noise tape :  35 Hz - 14,000 Hz (±3 dB)
CrO₂ Tape :  35 Hz - 15,000 Hz (±3 dB)
FeCr Tape :  35 Hz - 16,000 Hz (±3 dB)
Distortion:  less than 1,5% using Low Noise tape (1,000 Hz 0 VU)
Signal-to-Noise Ratio:  better than 51 dB (measured via tape with peak recording level of +3 VU)
Dolby Switch ON:  improves up to 10 dB above 5 kHz
Erase Ratio:  better than 70 dB
Bias Frequency:  85 kHz
Heads:  two - 1 x recording/playback head, 1 x erase head
Motor:  electronically speed controlled DC motor
Fast Forward/Rweind Time:  80 sec. Using C-60 cassette tape
Output Jack: 
2 x  Line :  410 mV (0 VU). Required load impedance more than 20 k Ω
Phone :  50 mV/8 Ω
Input Jacks:
Microphone :  0,3 mV. Required microphone impedance 600 Ω
2 x Line :  70 mV/ 100 k Ω
DIN Jack:  Input 0,3mV/ output 410 mV
Semiconductors:  24 Transistors; 25 Diodes;  2 ICs
Power Requirements:  120 V, 60 Hz (CSA, UL, LA models)
Other Modeles:  110/120/220/240 (switchable) 50/60 Hz
Dimensions (W x H x D):  400 x 165 x 300 mm (17,3" x 6,4" x 11,8")
Weight:  6,8 kg 915,0 lbs)

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