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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





ROTEL RA 1412






Specifications
Continuous Power Output:
110 watts per channel (min. RMS, both channels driven  into 8 Ω from 20 to 20,000 Hz with no more than 0,1% THD)
Total Harmonic Distortion:  0,1% (max. at rated power output from 20 to 20,000 Hz ID))
IM Distortion:  0,3% (1 kHz at rated power output, -1dB)
Frequency Response:  3 - 100,000 Hz(±1 dB at 1 watt per channel)
Input Sensitivity/Impedance:  980 mV/33 kΩ
Damping Factor:  80 (±10 %)
Speaker Impedance: 
4 to 16 ohms (A, B  or C)
8 to 16 ohms (A + B, A + C, B + C)
Pre -amplifier  Section:
Output Voltage/Impedance:  980 mV/100 Ω, 2 V max.
Harmonic Distortion:  Less than 0,08% at rated output voltage
Frequency Response:  3 to 50,000 Hz, ±1 dB
Signal-to-Noise Ratio:
Phono 1 & 2, Mic : more than 75 dB (IHF "A" network closed circuit)
Tape, Tuner, Aux 1 & 2 : more than 95 dB (IHF "A" network closed circuit)
Residual Noise: Less than 1 mV
Input Sensitivity/Impedance:
Phono 1 &2 : 2, 4, 8 mV/25, 50, 100 kΩ (adjustable)
Tape, Tuner, Aux 1 & 2 : 150 mV/50 kΩ
Mic : 2,5 mV/50 kΩ
Output level
Tape Out (RCA Jack) : 350 mv/3,3 kΩ
Tape Out (DIN) : 120 mV/90 kΩ
Phono Overload:  More than 300 mV at 0,1% THD
Phono Equalization (RIAA Standard):   ±0.2 dB
Tone Controls Bass at 100 Hz :
±10 dB (400 Hz turnover);
±7 dB (200 Hz turnover)
Tone Control Treble at  10 kHz :
±7 dB (5 kHz turnover);
±10 dB (2,5 kHz turnover)
Filters:
High:  12 dB/oct at 8 kHz, 12 kHz
 Low:  12 dB/oct.  at 30 Hz, 15 Hz (subsonic)
Subsonic Fiter: 15 Hz
Loudness Control:
+20 dB at 50 Hz/+6 dB at 10 Hz ;
+10 dB at 50 Hz/+3 dB at 10 kHz (2-position)
Audio Muting:  -10 dB,  -20 dB (2-position)
Crosstalk: 50 dB overall
General Info
Semiconductors Used:  62Transistors; 1 IC; 28 Diodes
Power Consumption:  850 watts max.
Dimensions: overall (W x H x D):  540 x 180 x 430 mm
Weight:
22 kg (48.4 lbs) net