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 X-2000SD

 Akai's X-2000SD has combined Cassette, Cartridge and Reel to Reel. Recording /Playback within a single tape recorder.
All the features which can be attained by using Five conventional recorders have been inter-connected to bring you another Akai Quality Tape Recorder.
Reel-to-Reel: 4 track Stereo recording and playback with a one-micron gap head,.
Cartridge: 8 track Stereo recording and playback with a one-micron gap head.
Transfer from reel to Cartridge and transfer from Reel to Cassette are unique features of this model.
 Outstanding Features
Hi-Fi Stereo Sound produced by a high capacity 12 W 2 IC Main Amplifier plus a 2 IC preamplifier and high compliance built-in speakers.
Silicon transistors and shield-type head for high S/N ratio.
Sturdy Mechanism
Main Amplifierprotector fuse.
Tone controls
Slide-type VU Meters
On/Mute speaker Switch
DIN jack
Fine oil-finished wooden cabinet
Vertical or horizontal operation
Universal voltage selector (100 V to 240 V, 50/60 Hz)
 Reel-to-Reel
4-track Stereo/Monaural recording and Playback
Tape Speed:  1-7/8, 3-3/4, 7-1/2 ips (15 ips w/adapter)
Heads:  Cross-Filed head System (Erase/Recording and Playback/Bias)
Track Selector
Automatic Shut-off, Pause Control
Index counter
Tape Lifter
Buil-in Reel retainer
Tape Speed Equalizer.
 Cassette
4-track Stereo Recording and Playback
Transfer from Reel to Cassette
Tape Speed:  1-7/8 ips
Heads: Erase and one-micron gap Recording/Playback Head
Panel push-buttoncontrols
Automatic Stop
One hour continuous cassette stereo performance (with C-120 cassette tape)
Frequency Response:  30  to 16,000 Hz
 Cartridge
8-track Stereo Recording and Playback
Transfer from reel to Cartridge
Tape Speed:  3-3/4 ips
Heads:  Erase and one-micron gap Recording/playback head
Cartridge program Selector (can be remote controlled)
Program Indicator lamp
One hour continuous stereo performance (with 300 ft. cartridge tape)
Automatic stop
Specifications
Recording System
REEL:  In-Line 4-track stereo/monaural Cross-Field head Recording System
CARTRIDGE:  In-Line 8-track stereorecording system
CASSETTE:  In-Line 4-track stereo recording system
Transfer:  pre-recorded conventional reel tape can be dubbed on the cartridge tape and cassette tape
Playback System
REEL:  In-Line 4-track stereo/moaural playback system
CARTRIDGE:  In-Line 8-track stereo playback system
CASSETTE:  In-Line 4-track stereo playback system
Tape Speed:
REEL:  1-7/8, 3-3/4, 7-1/2 ips (15 ips  optional)
CARTRIDGE:  3-3/4 ips
CASSETTE:  1-7/8 ips
Tape Speed Deviation:  Within ±3% (Cassette +4%, -2%)
Wow and Flutter:
REEL:  less than 0,2% at 7-1/2 ips; 0,3% at 3-3/4 ips; 0,35% at 1-7/8 ips
CARTRIDGE:  less than 0,35%
CASSETTE:  less than 0,35%
Frequency Response
REEL: 
7-1/2 ips : 30 -22,000 Hz
3-3/4 ips : 30 - 18,000 Hz
1-7/8 ips : 30 - 9,000 Hz
CARTRIDGE:  50 - 18,000 Hz (±3 dB)
CASSETTE:  30 - 16,000 Hz (±4 dB)
Signal-to-Noise Ratio:
REEL:  better than 48 db
CARTRIDGE:  better than 40 db
CASSETTE:  better than 40 dB
Distortion:
REEL:  2% at 1000 Hz 0 VU;  5% at 1000 Hz 10 W
CARTRIDGE:  3% at 1000 Hz 0 VU
CASSETTE:  3% at 1000 Hz 0 VU
Cross Talk:
REEL:  40 dB at Stereo
CARTRIDGE:50 dB
CASSETTE:25 dB
Erase Ratio:
REEL:  less than -70 dB
CARTRIDGE:  less than -60 dB
CASSETTE:  less than -60 dB
Insulation resistance:  more than 50 M ohms
Output:
Line :  1,228V (+4 dB) 250 Hz 8 Ω Impedance
Required Load Impedance:  more than 25 k Ω
Power :  more than 5 W per channel
Input Level/Impedance:
Line : more than 50 mV (-25 dB)/330 k Ω
Mic. : 0,5 mV (-65 dB)/4,7 k Ω
DIN Output:  0,4 V 250 Hz; 10 k Ω Impedance
Required Load Impedance:  more than 50 k Ω
DIN Input/Impedance:
High : 50 mV (-25 dB)/330 k Ω
Low : 5 mV (-45 dB)/39 k Ω
F.Forward & Rewind Time:
90 secondes a 1200 ft tape at 50 Hz
75 seconds using a 1200 ft. Tape at 60 Hz
MOTOR:
Horease Power : (1/100 HP)
Power ratio : 70 %
Revolutions : 2900 to 1450 rpm at 50 Hz; 3480 to 1740 rpm at 60 Hz
Condenser Capacity:  2,5 µF at 50 Hz; 2,0 µF at 60 Hz
HEADS:
REEL:
Recording/Playback : 4 track (Gap 2/1000 mm)
Impedance : 1,2 k Ω at 1000 Hz
Bias : Gap 0,2 mm
Impedance : 0,5 k Ω at 60 Hz
Erase : same as Bias head
CARTRIDGE:
Recording/Playbak : 8 track (Gap 1/1000 mm)
Impedance:  0,75 k Ω at 1 kHz
Erase : Gap 0,1 mm
Impedance : 0,21 k Ω at 90 kHz
CASSETTE:
Recording/Playback : 4 track (Gap 1/1000 mm)
Impedance : 1 k Ω at 1000 Hz
Erase - Impedance : 0,73 k Ω at 100 kHz
Semiconductors:  12 Transistors; 4 Ics; 6 Silicon Diodes; 10 germanium Diodes; 3 Relay
Power Requirements:  100 to 240 V AC, 50/60 hz
Dimensions  (W xH x D):  350 x 465 x 270 mm (13,8" x 18.3" x 10,6")

Weight:  22,4 kg (49,4 lbs)

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