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How to make your AMP'S TUBES last LONGER! Dr. Z AMA!

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Dr. Z AMA: "Voicing an amplifier"

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Dr. Z AMA: "How to use your Stand-by Switch"

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Eurotubes Generic Bias Video

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Synergy Z Wreck - Best Synergy Module Yet!

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Biasing Tube Amps

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PSAVNE Horizon KT88, 12AX7 & 12AU7 Tubes Review

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The Effect of Output Tube Bias on Tone, Gain, and Headroom.....A Side-by-Side Comparison