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-930AX amplifier


Rotel Stereo Integrated Amplifier RA-930AX

Specifications
Continuous Power Output:  30 wattts per channel, min. RMS both channels driven into 8 ohms from 20 to 20,000 Hz with no more than 0,03% Total Harmonic Distortion
DIN Output:  50 watts per channel (1 kHz, 4 , 1 % Total Harmonic Distortion)
Music Power:  110 watts
Total Harmonic Distortion (20 to 20,000 Hz from Aux): 
Continuous Rated Power Output :  no more than 0,03%
Continuous 1/2 Rated Power Output :  no more than 0,03%
1 watt per Channel Power Output, 8  :  no more than 0,03%
Intermodulation Distortion (60 Hz : 7 kh = 4 : 1)
Continuous Rated Power Output :  no more than 0,03%
Continuous 1/2 Rated Power Output :  no more than 0,03%
1 watt per Channel Power Output, 8  :  no more than 0,03%
Output IMpedance
Speaker :  4  minimum
Headphone :  8 - 2,000
Damping Factor:  180 (20 to 20,000 Hz, 8 )
Input Sensitivity/Impedance: 
Phono :  2,5 mV/47 k
CD, Tuner :  150 mV/20 k
Tape, Aux : 150 mV/20 k
Overload Level (T.H.D. 0,5%, 1 kHz)
Phono :  180 mV
CD, Tuner :  5 V
Tape, Aux ;  5 V
Frequency Response
Phono :  20 to 15,000 Hz ±0,3 dB (RIAA Std)
CD,Tuner :  10 to 40,000 Hz ±1 dB
Tape, Aux :  10 to 40,000 Hz ±1 dB
Tone Control
Bass :  ±6,0 dB at 100 Hz
Treble :  ±6,0 dB at 10 kHz
Signal-to-Noise Ratio (IHF, A Network)
Phono :  80 dB
CD, Tuner, Tape, Aux : 100 dB
Miscellaneous
Power Requirement:  120 V, 220 V, 240 V;  50/60 Hz
Power Consumption:  180 watts
Dimensions (W x H x D):  440 x 92 x 304 mm (17-3/8" x 3-5/8" x 12")
Weight:  5,9 kg (13,0 lbs)


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