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 BR-1000 power amplifier


RB-1000 Power Amplifier
A stereo power amplifier FTC rated for 8 ohms at 65 watts RMS per channel, 20 to 20,000 Hz , at a distortion no higher than 0,003% T.H.D.
There is one set of line level stereo inputs. Putputs for two speaker systems. An output hold-off prevents power supply turn-on transients from being fed to the speakers. The front panel has controls for left input level and right input level. Switches for power, speaker system A, and speaker system B. two switched AC outlets are provided.
Performance. The power output per channel at the clipping level with both channels driven 20 to 20,000 Hz measured 66 watts RMS. The Frequency Response at 66 watts/8 ohms was "ruler flat" from 20 to 20,000 Hz at a distortion no higher than 0,022% T.H.D. at any frequency.
Overall dimensions are 16-15/16-inch (wide), 3-27/32-inch (high), 11-11/32-inch (deep). Weight is 15,6 lbs.

Specifications:
Continuous Power Output:  65 watts per channel min. RMS both channels driven into 8 Ω or 75 watts per channel both channels driven into 4 Ω from 20 Hz to 20 kHz with no more than 0,03% T.H.D.
Total Harmonic Distortion (20 Hz to 20,000 Hz): 
No more than 0,03% (continuous rated power output)
No more than 0,01% (32,5 watts per channel power output,, 8 Ω)
No more than 0,01% (1 watt per channel power output, 8 Ω)
Intermodulation Distortion (60 Hz : 7 kHz = 4 : 1):
No more than 0,03% (continuous rated power output)
No more than 0,01% (32,5 watts per channel power output,, 8 Ω)
No more than 0,01% (1 watt per channel power output, 8 Ω)
Frequency Response:  5 - 100,000 Hz +0 dB -1 dB (1 watt per channel power output, 8 Ω)
Input Sensitivity/Impedance:  1 V/20 k Ω
Damping Factor:  50 (20 - 20,000 Hz , 8 Ω)
Hun and Noise:  110 dB )IHF, A network)
Residual Noise:  150 µV
Crosstalk (10 kHz):  55 dB
Power Requirements:   120 V/60 Hz or 220 V/50 Hz or 240 V/50 Hz or 100, 120, 220, 240 V \; 50/60 Hz
Power Consumption:   500 watt max
Dimensions (W x H x D):  430 x 98 x 290 mm
Weight:  7,1 kg (15,62 lbs)

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