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β22 Balanced Stereo Amplifier Build – Toli's DIY
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The Beta 22 Thread | Page 6 | Headphone Reviews and Discussion - Head-Fi.org
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I made a Beta22 headphone amp! : r/diyaudio
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The Beta 22 Amplifier Reviewed
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The β22 stereo amplifier
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The Beta 22 Amplifier Reviewed
