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The 12AX7 is the single most important signal preamp tube. The PM 12AX7A tubes are built to the highest possible standard and have extra screening to eliminate microphony (squeal) and excessive white noise. This high quality tube will replace all 12AX7, 12AX7A, 12AX7WA, ECC83, E83CC, ECC803S, 5751, 6157, 7025, and M8137 tubes."
Made in China
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