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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





Akai AA-5500 amplifier

Solid State Stereo Pre-Main Amplifier

This dynamic 120 W music power stereo pre-main amplifier is ahead of its time with highly advanced circuitry, multiple amplifier convertibility, versatility, and design. SEPP-ITL-OTL circuit and power bandwidth of 20to 45 Hz for full dynamic range and the realization of less than 0,1% distortion. The direct-coupled preamplifier and phono amplifier circuits utilize spece-age integrated circuits for superb tone quality. The playback and recording jacks can be used separately or simultaneously for varied recording and playback techniques. Multiple input, output and speaker connections. The pre and the main amplifiers can b separated for future multiple amplifier operation. Attractive design to blend in with any audio components.

 


Specifications:

Music Power Output:  60 W/ 60 W at 4 Ω  or 40 W / 40 W at 8 Ω

Rated Power Output:  45 W/ 45 W at 4 Ω   or 30 W/ 30 W at 8 Ω  (0,8% I.H.F.)

Rec Output: 

PIN :  150 mV

DIN :  25 mV

Input Sensitivity:

Aux :  150 mV

Tuner :  150 mV

Phono 1, 2 :  3 mV

Tape 1, 2 :  150 mV

Mic :  1 mV

Total Harmonic Distortion.  Less than 0,1% at 10 W, 8 Ω

Frequency Response:  20 to 50,000 Hz _3 dB (20 to 50,000 Hz-5 dB at 0 dBm, 8 Ω )

Hum and Noise:  less than -44 dBm , Volume Minimum

Signal-to-Noise Ratio

Aux :  more than 70 dB

Tuner :  more than 70 dB

Phono 1, 2 :  more than 65 dB

Tape 1, 2 :  more than 70 dB

Mic :  51 dB

Tone Controls

Bass :  ±10 dB at 100 Hz

Treble :  ±10 dB at 10,000 Hz

Loudness Control:  7 dB (+_1,5) at 100 Hz and 4 dB (±1,5) at 50 Hz (-10 dBm output)

Filters: 

Low Cut Filter :  -12,5 dB (±1,5) at 50 Hz

High Cut Filter :  -6 dB (±1,5) at 10 kHz

Mute Level:  -20 dB ±1

Power Bandwidth:  20 to 45,000 Hz (20 to 30,000 Hz at 15 W, 8 Ω , 0,8 I.H.F.)

Semiconductors:  17 Transistors; 5 ICs; 10 Diodes; 2 Varistor: 1 SCR

Power Requirements:  100 - 240 V AC 50/60 Hz

Power Consumption:  300 W

Dimensions (W x H x D):  432 x 143 x 330 mm (17,2" x 5,7" x 13,2")

Weight:  9,9 kg (21,8 lbs)

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