1. TUZ How To Make Simple B688 D718 Transistor Amplifier - Powerful Ultra Bass

    TUZ How To Make Simple B688 D718 Transistor Amplifier - Powerful Ultra Bass

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  2. DIY HEAVY BASS AMPLIFIER WITH TRANSISTOR B688 & BD139

    DIY HEAVY BASS AMPLIFIER WITH TRANSISTOR B688 & BD139

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  3. DIY 2 CHANNEL POWERFUL BASS AMPLIFIER WITH TRANSISTOR D718*2 & B688*2

    DIY 2 CHANNEL POWERFUL BASS AMPLIFIER WITH TRANSISTOR D718*2 & B688*2

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