The Electro Harmonix KT88 now boasts a higher output, delivering improved authentic musical responses at both low and high frequencies. It features a new design that ensures more stable harmonics. Electro-Harmonix tubes, renowned for their excellent quality, are all newly designed. Many original equipment manufacturers (OEMs) use these relabeled vacuum tubes in their amplifiers. For those seeking high-quality sound at an affordable price, Electro-Harmonix tubes are a commendable choice.