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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 POA-1003


POA-1003 Power Amplifier was introduced to do away wit unnecessary decoration with the sole object of listening to music. Simple in design, with no distortion, it offers quick responding transparent sound by providing circuitry for DC amplifiers. Left and right completely monaural constitution. Either side is provided with an excessive power circuit, highly accurate peak meter allowing ultra wide, and low distortion.
DC power amplifier with features of cascode coupling at  the first stage low noise FET differential amplifier, a stage of current mirror differential amplifier with emitter follower predriver, bipolar type power transistor of a clas with a collector loss of 100W in a novel circuitry of pure complementary ICL OCL, producing a wide band, low distortion, and high Signal-to-Noise ratio.

A stable DC drift of 1,6 mV/°C
Exceptional damping factor of 200
Highly stabilized constant voltage circuitry use in the first stage power section, oversized capacitor 88,000 µF, left and right independent transformer.

Specifications:
Type:  Silicon Transistor, DC power Amplifier
Rated Output (both channel driven):
20 Hz - 20 kHz at 4 Ω :  100 W rms at each channel;
20 Hz - 20 kHz at 8 Ω :  85 W rms at each channel
Total Harmonic Distortion (at rated output):  0,005% at 20 Hz , -1 kHz; 0,03% at 20 kHz
Intermodulation Distortion (60 Hz /7 kHz: 4/1):  0,02%
Power Bandwidth:  3 Hz - 70 kHz
Frequency Response:  DC 100 kHz +0 dB, -1 dB
Input Sensitivity?Impedance:  1 V rms/50 k Ω
Output Impedance/Damping Factor:  0,04 Ω/200 (at 8 Ω)
Signal-to-Noise Ratio:  119 dB (IHF A)
Low Filter: 20 Hz (6 dB/oct)
Power Supply:  AC 120 V; Ac 220 V, 50/60 Hz
Power Consumption:  250 W
Dimensions (W x H x D):  410 x 200 x 285 mm
Weight:  18 kg
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2 comments:

  1. AnonymousApril 23, 2019 at 1:07 PM

    I need power switch (yellow knob on the left) for this amp. Can anyone help.
    Much appreciated.

    ReplyDelete
  2. MariusMarch 26, 2020 at 12:40 AM

    Hello Friends,
    I need POA-1003 service or owners manuals, many thanks.

    ReplyDelete

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