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





Trio KX-720 (1977)


KX-720 Dolby cassette deck
Similar in design to the KX-920, the KX-720 retains many of its fine features at a realistic price level.

DC servo motor driving an extra large 90mm flywheel system.
New Super-Ferrite recording/playback head.
Slider control memory markers
Separate tape bias and equalization switches catering for normal, ferrochrome and chrome-dioxide tapes.
Quick reaction peak recording level indicator.
Cue and Review system for precise programme selection.
Three digit tape counter.
Connections:  two microphones, stereo line input/output, stereo DIN input.output, headphones.

Specifications
Tape system:  4-track, 2 channel stereo
Tape speed:  1⅞ i.p.s.
Usable tape: C-30, C-60, C-90 Compact Cassette
Heads:  Super ferrite
Motor: DC servo
Wow and Flutter:  0,08%
Frequency response:
Normal tape:  30 Hz - 14 kHz
Cr0₂ tape: 30 Hz -16 kHz
S/N ratio (Dolby IN):  62 dB (Cr0₂ tape)
Recording system: AC bias 85 kHz
Erasing system:  AC bias
Inputs Line:  77,5 mV/340 kΩ
DIN:  0,45 mV/1,3 kΩ
Microphone:  0,24 mV/10 kΩ
Output:  490 mV/100 kΩ
Fast forward/rewind time:  80 sec  (C-60 Compact Cassette)
Power consumption: 23 watts
power requirements:  240 V AC
Dimwnsions:  404 x 124 x 252 mm
Weight: 5,3 kg

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