PreSonus TubePre Mod Vintage GE Vacuum Tube


I had read on a number of audio forums that swapping the factory vacuum tube in the PreSonus TubePre with a vintage USA made tube would improve the sound quality, more specifically making it much warmer. So I did the research to find out how to dismantle my TubePre, and looked at the specs to find out the exact size and type of vacuum tube that it uses (12AX7), and then set out on eBay to find a new-old-stock vintage GE tube.

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