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Pioneer SX-690

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Pioneer SX-690

The Pioneer SX-690 is an AM/FM stereo receiver with 2 hybrid ICs power amplifier output containing bias, driver and output stages in quasi-complementary circuits. Output is direct-coupled OCL following a first-stage differential amplifier.

Features include Pioneer’s exclusive PLL MPX IC incorporating automaitc pilot signal canceller and a CR-type tone control network.
Specifications

Tuning range: FM, MW

Power output: 30 watts per channel into 8Ω (stereo)

Frequency response: 10Hz to 60kHz

Total harmonic distortion: 0.1%

Signal to noise ratio: 75dB (MM), 90dB (line)

Dimensions: 435 x 144.5 x 314mm

Weight: 8.9kg

Year: 1978

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Why should change the electrolytic capacitors?

  • 1 - Electrolytic capacitors are among the most important in an audio equipment and replacing them with high-quality capacitors from the factory will improve the sound quality
    2 - Electrolytic capacitors have life of work 1000-2000h then begin to lose their qualities
    3 - The use of Audio-Grade Capacitor Nichicon / Elna which are made specifically for audio equipment from high-end will make your machine in good times higher

What is audio grade capacitor?

  • This is capacitors specifically for audio applications. These are designed to give premium sound quality when compared to general purpose capacitors.
    Nichicon's MUSE series and Elna SILMIC II, ideally suited for first class audio equipment where qualitative and quantitative characteristics are required.

What you should know when you make replacement

  • 1 Mark all cables when separate circuit boards to avoid confusion in the assembly
    2 All capacitors meet on parameters of old, replace them one by one so as not to get confused!
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