The simple low voltage preamplifier circuit for headphone with tone control that use 1.5V X 2.The transistors as main. For MP3 player or other small source.
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These are Tone control circuit using op amp - NE5532 or 4558 IC as low noise, with PCB layout, can adjust sound frequency and tone bass, treble, mid and..
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These are many pre tone control circuit, use transistors as main. so low noise,good sound, cheap and easy to buy parts, you can builds with PCB layouts
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The Hi Fi preamplifier circuit project to tune smooth bass-treble, with a very low distortion. Use low noise transistors Frequency response range 20Hz-20KHz [...]
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This is a bass booster circuit that use transistors as base. It is designed to increase a low frequency of audio on cheaper than ICs or normally circuit.
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This is a general-purpose bass booster circuit. Why should you use this? You are listening to your favorite song. But it lacks many flavors. Friends said No Bass! Buy a new one amplifier right now. Stop... It is true. Your amplifier may less bass. But before buying a new amplifier. Try this, it probably better.
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This is Bass treble tone control circuit diagram as ideas, we have two circuits both transistors ,ICs-op amp as main, so smaller, but high gain signal.
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