Audiophile 6J1 Tube preamplifier Headphone power amplifier Power amp tube buffer DIY kit Base on music fidelity X-10D circuit

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Newest 6j1 tube preamp amplifier board pre-amp headphone amp 6j1 valve preamp bile buffer diy kits(6j1 tube preamp amplifier boa

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-0.9%

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Newest 6j1 tube preamp amplifier board pre-amp headphone amp 6j1 valve preamp bile buffer diy kits(6j1 tube preamp amplifier boa

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Newest 6j1 tube preamp amplifier board pre-amp headphone amp 6j1 valve preamp bile buffer diy kits(6j1 tube preamp amplifier boa

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Incomplete data

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-6%

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-7%

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5.0

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-0.4%

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-8%

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-0.7%

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-3%

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-8%

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5.0

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-28%

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-3%

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-1%

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-14%

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