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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





Philips FA-630 amplifier


Specifications

Output Power (Nominal):  27 W at 8 Ω  (IEC)

Total Harmonic Distortion :  less than 0,05% at 1 kHz

Intermodulation Distortion:  less than 0,05% at 60/7000 Hz 4:1

Frequency Characteristics:

Phono :  20 Hz - 20 kHz ±1 dB (IEC)

Other Inputs :  20 Hz - 30 kHz ±1 dB

Controls

Bass :  ±10 dB at 63 Hz

Treble :  ±10 dB at 12,5 kHz

Loudness:  +6 dB at 100hz ; +4 dB at 10 kHz

Signal-to-Noise Ratio (weighted A-curve)

Phono (5 mV) :  better than 72 dB (for 25 W)

Others Inputs (500 mV ) :  better than 90 dB  (for 25 W)

Channel Separation:

At 1,000 Hz better than 56 dB

From 250 Hz to 10 kHz better than 40 dB

Input Senesitivity/Impedance:

Phono :  2,6 mV / 47 k Ω

Other :  150 mV / 30 k Ω

Output Level/Impedance

Tape 1, 2 :  250 mV / 270 Ω  (phono 5,0 mV  1 kHz input)

General

Mains Voltage:  220 V; 240 V

Mains Frequency: 50 / 60 Hz

Power Consumpton:  140 W

Dimensions (W x H x D):  420 x 100 x 260 mm

Weight:  4,9 kg

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