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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-330 reel-to-reel

Multi-Purpose Program Minder Tape Recorder

The X-330 enables to enjoy different music for 24 hours, in addition to selection and repeating your favorite tune forever.
 Program minder automatic continuous reverse
Sensing tape continuous reverse
Manual reverse
Cross-field head
3-speed capstan drive motor
Magnetic brake
Up to 10-1/2" reel acceptable

Outstandig features:
4-track stereo/monaural recording/playback
Program minder (Automatic continous reverse)
Sensing tape continuous reverse, manual reverse
Cross field head
Magnetic brake with tach generator (stoppage occurs within 3 seconds from F.F. / RWD  condition (10-1/2" reel)
Up to 10-1/2" reel acceptable. Back tension control
3 speeds (7-1/2; 3-3/4 and 1-7/8 ips)
3 motors: A hysteresis synchronous 3-speed motor for capstan drive; Two 6-pole eddy current out rotor motors for supply and take-up reel drive
4 heads: Erase; playback; record and bias heads
40 W all silicon transistorized amplifier
12 hours continuous HiFi stereo recording capacity (total 24 hours) at 1-7/8 ips with 7,200 foot tape
Shield type head for high Signal-to-Noise ratio
Tape lifter in fast forward and rewind operation
Track selector for simple selection between stereo and monaural
Automatic stop/shut off, Automatic pinch wheel release
Sound on sound, Sound with sound, Sound over sound, Echo effect
100 kHz biased for FM multiplex recording
Magnetic cartridge jacks (Direct recording and playback from turntable), Stereo headphones jack, DIN Jack
Remote controllable, AC outlet with automatic shut off switch
Standard/low noise tape selector. Bass and treble controls
Tape cleaner, 4-digit index counter with reset button, VU meters
Fine oil-finished wooden cabinet
Universal voltage selector (from 100 V to 240 V, 50/60 Hz)

Specifications
Tape Speed:  1-7/8, 3-3/4 and 7-1/2 ips
Wow and Flutter:
At 7-1/2 ips :  less than 0,04% RMS
At 3-3/4 ips :  less than 0,07% RMS
At 1-7/8 ips :  less than 0,15% RMS
Frequency Response [Standard Tape / low Noise tape]:
At 7-1/2 ips :  30 to 25,000 Hz / 30 to 26,000 Hz ±3 dB
At 3-3/4 ips :  30 to 18,000 Hz / 30 to 20,000 Hz ±3 dB
At 1-7/8 ips :  30 to 9,000 Hz / 30 to 13,000 Hz  ±3 dB
Distortion:  within 1,5%,  1 kHz,  0 VU at 7-1/2 ips
Signal-to-Noise Ratio:  better than 50 dB
Input Level:
Microphone :  more than 0,5 mV
Line :  more than 50 mV
DIN :  more than 10 mV
Power Output: 
15 W maximum each channel at Undistorted Power, total 30 W.
20 W maximum each channel at Music power, total 40 W
Equalization:  Standard or Low Noise Tape. Correct equalization for playback of tapes recorded to the NABTB curve
Recording Bias Frequency:  100 kHz
Recording Level Indicator:  2 VU meters
Recording System:  4-track stereo/monaural, Cross Field bias system
Fast Forward and Rewind Time:  75 seconds using 1,200 foot tape (7" reel) at 50 Hz , 60 seconds at 60 Hz
Heads:  4 heads - Erase, playback, record and bias heads
Motor:  3 motor - Hysteresis synchronous 3-speed motor for capstan drive. Two 6-pole eddy current outrotor motors for supply and take-up reel drive with tach generator
Reel Size:  10-1/2"; 7' and 5" reels
Speaker:  2 4' x 6" speakers
Power Supply:  AC from 100 to 240 V, 50/60 Hz
Power Consumption:  180 VA
Dimensions (W x H x D):  375 x 436 x 238 mm (14-3/4" x 17-1/8" x 9-3/8")
Weight:  22 kg (48,4 lbs)


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