Pictured a McIntosh C20 pre-amplifier. Note the full compliment of Telefunkin tubes all NOS test! It came in with an intermittent noise in both channels. A few caps later along with some proper contact cleaning and a bit of “Tubeology” work with selection/match of the Telefunkin’s and our proprietary tube socket and pin contact enhancing process (DNA) It’s sounding stunning! In audiophile terms, “fast, transparent, detailed, deep and layered sound-stage, engaging”
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