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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





Aiwa AS-S30 amplifier

Stereo Integrated Amplifier

Fifteen big Watts per channel of honest-to-goodness high fidelity sound from a 2-stage differential SEEP-OCL integrated amplifier an incredibly compact 7,1 cm high by 21 cm wide. Yet, the A30 has plenty of room to accommodate up to 4 external components including tape, deck, tuner and record turntable.

Power output has been boosted by use of a new extra-stable power transformer with independent coils for power and preamplifier sections, and enlarged heat sinks aid in efficient heat dissipation.

For low noise and dynamic performance from high quality MM phono cartridges, the improved phono equalizer IC has boosted Signal-to-Noise Ratio to an excellent 82 dB, with very low 0,005% distortion at 1 kHz. RIAA equalization is a remarkably precise ±0,2 dB throughout the 20 to 20,000 Hz frequency range. For well-balanced listening at low output volumes a switchable loudness compensation circuit is provided.

 

 

Plus features:

5-LED logarithmic peak output indicator [0,1 - 40 watts]

AUX component terminals

Stereo headphone jack

Power On LED indicator

Bass, treble, balance controls

Quick one-touch speaker connection terminals

Rack handles included

 


Specifications

Type:  Stereo integrated amplifier

Semiconductors:  5 ICs; 5 Transistors; 12 Diodes, 6 LEDs

Power Amp Section

Effective Output Power:  20 W + 20 W (8 Ω ) U model

15 Watts per channel , Min. RMS at 8 Ω , from 20 Hz - 20 kHz, with no more than 1% T.H.D.

Tdh :  0,1% (1 kHz, 5 W + 5 W) U model

Total Harmonic Distortion from 20 to 20 kHz at 250 mW to 15 W power at 8 Ω  , 1 % Max

Output Bandwidth:  10 Hz to 20,000 Hz (less than1%)both channel driven, 8 Ω

Frequency Response:  20 to 20,000 Hz

Pre-Amp Section

Signal-to-Noise Ratio (IHF A curve, short circuit, Weighted):

Phono :  better than 76 dB

Tuner, Aux :  better than 90 dB

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble :  ±8 dB at 10 kHz

Loudness:

6,5 dB at 100 Hz (±1,5 dB)

3,5 dB at 10 kHz (±1,5 dB)

RIAA Deviation: ±0,2 dB (20 Hz - 20,000 Hz)

Channel Separation: better than 40 dB

Phono Overload Level:  better than 100 mV (MM, at 1 kHz)

Channel Balance:  less than 3 dB

Residual Noise:  less than 2 mV

Input Sensitivity/Impedance:

Phono :  2,5 mV/47 k Ω

Tuner :  150 mV/47 k Ω

Aux :  150 mV/47 k Ω

Tape :  150 mV/47 k Ω

Output Level/Impedance:

Tape :  120 mV/47 k Ω

Headphones Load Impedance :  8 to 16 Ω

Speakers Impedance :  8 to 16 Ω

Power Requirements:  AC 110 / 220 / 240 V, 50/60 Hz

Power Consumption:  40 W

Dimensions (W x H x D):  210 x 71 x 200 mm (8-1/4" x 2-3/4" x 7-7/8")

Weight:  3,15 kg (6,9 lbs)


 

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