The sound of the oil paper capacitor, it is the new sound of an outdated one. The nostalgic wet sound you hear someday, and the harmony feeling unique to the oil paper capacitor is a helpful way to pull the rich tone of the vacuum tube amplifier. The contemporary-inspired form is a combination of oil-impregnated paper and aluminum foil, so nothing is changed as long as it was before. The wet type will look great on vacuum tube amplifiers.