真空管機線路圖 Complete Preamps Gicca zur Linde zur Linde SRPP Line Preamps 5687 12AU7/ECC82 zur Linde 6DJ8/ECC88 single 6DJ8/ECC88 parallel 6DJ8/ECC88 SRPP Preamps (phono RIAA) RIAA curve Hiraga SRPP Single ECC83 RCA
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