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

Akai AA-1030 receiver


The Akai model AA-1030 , is another machine that's packed with power.

Minimum 30 watts per channel RMS at 8  from 20 to 20,000 Hz with no more than 0,3% T.H.D. And frankly we're probably being over modest. It's certainly worth emphasising here that the power rating is a minimum. Typical samples, when measured with both channels driven at 1 kHz into 8 , should demonstrate quite clearly the importance of comparing specification in power output.

There's a delicately balanced flywheel for picking your spot on the waveband. And with AFC (Automatic Frequency Control) you get perfect FM centre tuning with completely drift-free reception. A low noise FET and 3-gang frequency rectilinear variable capacitor in the front end eliminate intermodualtion distortion for clear broadcast reception. Ceramic filters in the FM IF section give better reception of weak signals. IHF sensitivity is 2,0 µV. The Phase-Lock-Loop circuit produces complete stability with separation better than 40 dB

As with the AA-1020, the AA-1030 also has variable FM muting to let you select not only the strongest stations and the weakest stations the tuner can pick up, but any point in between as well. There's also a level adjuster to allow you to cut out local atation interference. There are separate bass and treble tone controls; loudness switch; high and low filters; the same comprehensive tape dubbing facilities as the AA-1020 (you can connect two tape decks for simultaneous recording from a single source and Tape monitor 1 has parallel DIN and phone connections), two sets of phono jacks; aux jacks; connections for two speaker systems; FM and AM antenna terminals and a distance/local switch.



Amplifier Section

Continuous Power Output: 

30 watts per channel , min. RMS, at 8 ohms from 20 Hz to 20 kHz, with no more than 0,3% T.H.D.

2 x 40 watts into 8  at 1 kHz, with no more than 0,3% T.H.D. both channel driven

2 x 50 watts  into 4  at 1 kHz, with no more than 0,3% T.H.D. both channel driven

Power Bandwidth (IHF) :  10 Hz to 60,000 Hz / 8  (Distortion within 0,3%)

Input Sensitivity/Impedance

Phono 1, 2 :  3 mV/50 k

Tape 1, 2 :  150 mV/80 k

Aux :  150 mV/80 k

Signal-to-Noise Ratio (IHF)

Phono :  better than 80 dB

Aux :  better than 90 dB

Channel Separation (IHF):

Phono :  better than 55 dB (at 1 kHz)

Equalizer Phono :  RIAA ±1 dB

Tone Controls

Bass :  ±10 dB at 100 Hz

Trebble :  ±10 dB at 10 kHz

Loudness Contour: +10 dB at 100 Hz; +6 dB at 10 kHz (Volume control set at -30 dB position)


High :  -8 dB at 10 kHz

Low :  -8 dB at 50 Hz

FM Tuner Section

Frequency Range:  88 MHz - 108 MHz

Sensitivity (IHF):  1,9 µV

Capture Ratio (IHF):  1,5 dB

Selectivity (IHF):  better than 70 dB at 98 MHz

Signal-to-Noise Ratio :  better than 70 dB

Image Rejection:  better than 65 dB at 98 MHz

IF Rejection:  better than 90 dB at 98 MHz

Spurious Rejection:  better than 70 dB at 98 MHz

Harmonic Distortion

Mono :  less than 0,2%

Stereo :  less than 0,4%

FM Stereo Separation:  better than 40 dB ( at 1 kHz)

FM Muting:  Variable (2 µV to 100 µV) On-Off

Antenna Input:  300   (balanced), 75   (unbalanced)

AM Tuner Section

Frequency Range:  535 kHz to 1605 kHz

Sensitivity (IHF):  200 µV/m (Bar antenna); 5 µV (ext. Antenna)

Image Rejection:  better than 55 dB at 1 kHz

IF Rejection:  better than 45 dB at 1 kHz

Selectivity (IHF):  better than 30 dB at 1 kHz

AM Distortion:  less than 0,6%

Signal-to-Noise Ratio:  better than 50 dB

General Section

Semiconductors:  1 FET, 33 Transitors; 15 Diodes; 3 ICs

Power Requirements:  120 V, 220 V, 240 V 50/60 Hz

Dimensions (W x H x D):  440 x 140 x 350 mm (17,3" x 5,5" x 13,8")

Weight:  13 kg (28,6 lbs)

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