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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





Denon PRA-1100 pre-amplifier

Stereo Pre-Amplifier

 


Specifications

Equalizer Amplifier (Phono In - Rec Out)

Input Sensitivity/Impedance:

Phono MC :  0,2 mV/100 Ω

Phono MM :  2,5 mV/47 k Ω

Phono Variable Input Capacitor:  200 pF - 600 pF

Max. Input Level

Phono MC :  13 mV/ 1 kHz

Phono MM :  160 mV/ 1 kHz

Max. Output ? Rated Output:  10 V / 150 mV

Total Harmonic Distortion :  less than 0,001% (1 kHz, 7 V output)

RIAA Deviation

Phono MC :  20 Hz - 100 kHz ±0,3 dB

Phono MM :  20 Hz - 20 kHz ±0,2 dB

Signal-to-Noise Ratio

Phono MC :  79 dB (A -weighted) at 0,5 mV Input

Phono MM :  96 dB (A -weighted) at 5 mV Input

Gain

Phono MC :  57,5 dB / 1 kHz

Phono MM :  35,6 dB / 1 kHz

Phono Subsonic Filter:  16 Hz, 12 dB/oct

High-Level Amplifier (AUX In - Pre Out)

Input Sensitivity/ Impedance:

CD, Tuner, Aux 1, 2; Tape 1, 2 :  150 mV / 47 k Ω

CD Direct :  1 V/ 10 k Ω

Max. Output/Rated Output:  10 V / 1 V

Total Harmonic Distortion :  less than 0,003% (20 Hz - 20 kHz, 5 V output)

Frequency Response:

1 Hz - 300 kHz +0,2 dB -3 dB

10 Hz - 100 kHz ±0,2 dB

Signal-to-Noise Ratio :  105 dB (A -weighted)

Tone Control:

Bass :  ±8 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Muting:  PRE Out Off and Headphones circuit muting (indication by LED)

Gain :  16,5 dB

Output Impedance:  10 Ω

General

Power Requirements:  AC 220 - 240 V 50/60 Hz

Power Consumption:  15 W

DC Output:  15 V x 2 (1 mA)

Dimensions (W x H x D):  434 x 119 x 302 mm (17-3/32" x 4-11/16" x 11-57/64")

Weight (net):  5,0 kg (11 lbs 1 oz)


 

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