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





Aiwa TPR-3001

IC + FET Stereo Receiver with Cassette Recorder. Features:
Revolutionary unit changes the image of stereos. A unique combination of stereo receiver and stereo cassette deck
Direct recording from the stereo receiver. Or turntables, tape decks and a microphone
Microphone mixing can be enjoyed
Sleep timer switch turns off all power when the tape ends
IC and FET employed
Silicon transistors provide superior frequency characteristics
SEPP, OLT, ITL circuits. Oytstanding 30 W output (music Power)
4-channel decoder makes future grading up of the system possible
Specifications
Type:  FM/AM Stereo Receiver with Cassette Recorder
Semiconductors   38 transistor radio; 16 auxiliary transistors; 1 FET; 1 IC; 16 diodes; 1 thyrister
Audio Section
Circuitry:  Complementary SEPP ITL/OTL circuit
Output:
30 WMusic Power
12 W + 12 W
Frequency Response:  30 - 50,000 Hz (main amp)
Distortion Factor:  less than 0,3% (at 10 W + 10 W, 1,000 Hz output)
Gain &Input Impedance:
Phono Mag :  5 mV / 50 k
Mic :  1,8 mV / 10 k
Aux In :  300 mV / 50 k
DIN (in) :  500 mV / 100 k
Output Level/Impedance
Line Out :  400 mV /10 k  
DIN (Out) :  30 mV/ 80 k
Speakers : 4 - 16
Tone Controls
Treble :  10 dB at 10 kHz
Bass :  10 dB at 100 Hz
Equalizer :  Phono RIAA
Damping Factor :  30  (8 )
Residual Noise:  less than 1,5 mV (at 8 , load, min. Vol)
Tuner Section
Frequency Range: 
FM :  87,5 - 108 MHz
AM :  525 - 1605 kHz
Sensitivity :
FM :  4 µV (IHF Standards)
AM :  180 µV/m (IHF Standards)
FM Frequency Response:  50 - 15,000 Hz
FM Signal-to-Noise Ratio:  60 dB
FM Distortion:  less than 0,5%
Antenna: 
FM :  300  or 75
AM :  Bar antenna built-in, antenna terminal
FM MPX Section
Separation:  better than 38 dB (1 kHz)
Distortion :  less than 0,7%
Tape Recorder Section
Recording Tracks:  4-track, 2-channel recording system
Tape Speed:  1-7/8 ips (4,8 cm/s)
Wow and Flutter:  0,25% (playback) RMS
Frequency Response:  30 -12,000 Hz (+3 -6 dB)
Signal-to-Noise Ratio :  better than 45 dB
Bias Frequency:  84 kHz
Erasing System:  AC erase
Motor:  Servo motor
Recording Level Indicator:  VU Meter
Power Source:  110 - 120 V , 220 - 240 V 50/60 Hz
Power Consumption:  60 W (max output)
Dimensions (W x H x D):  480 x 136 x 320 mm (18-15/16" x 5-3/8" x 12-6/8")
Weight: 8,0 kg (17,6 lbs)


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