2.1 Preamp Bass Filter Circuit 4558 Opamp

For the 2.1 amplifier project, I prepared a 4558 opamp preamplifier subwoofer filter circuit. The circuit is based on 2 4558 opamps, with the main audio input and bass output volume adjustment. Power supply symmetrical + -15VDC The PCB... Electronics Projects, 2.1 Preamp Bass Filter Circuit 4558 Opamp "audio control circuits, " Date 2019/12/08

For the 2.1 amplifier project, I prepared a 4558 opamp preamplifier subwoofer filter circuit. The circuit is based on 2 4558 opamps, with the main audio input and bass output volume adjustment. Power supply symmetrical + -15VDC

The PCB drawing was not very regular because I had to prepare it very urgently, but I ran it without problems.

The original circuit diagram was a bit confused above, I cleaned the schematic I used the bass output potentiometer in the PCB drawing stereo 22k. (I used mono pots in the tests)

The bass frequency of the circuit is not adjustable I don’t know what the frequency range is, but I didn’t calculate it, but it gave a very good bass sound.

2.1 Preamp Circuit diagram

Note: If you want to make the bass filter frequency adjustable, you can make potency connection according to the following diagram. Remember to connect the wire to the chassis from the metal part of the pots that have more work than I’ve left in the detailed assembly. Capacitor values: 104 (100nf) 682 (6.8nf) 224 (220nf)

FILE DOWNLOAD LINK LIST (in TXT format): LINKS-26275a.zip

Tags: audio control circuits

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2.1 Filtre de préampli Bass Circuit 4558 Opamp
Pour le projet d’amplificateur 2.1, j’ai préparé un circuit de filtre de subwoofer de préamplificateur opamp 4558. Le circuit est basé sur 2 4558 opamps, avec le réglage principal du volume d’entrée audio et de sortie des basses. Alimentation symétrique + -15VDC
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2.1 Preamp Circuit diagram

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