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Owning a vintage amplifie r is like holding a piece of history in your hands. The warmth , the character, the unmistakable sound - it’s something special. But keeping that magic alive? That takes care. I’ve spent years tinkering with my own gear, and I’m here to share what I’ve learned about maintaining the classic onix oa21 amplifier. Let’s dive in. Why Vintage Amplifier Renovation Matters Vintage amps aren’t just electronics. They’re living, breathing machines with delicat