Споко,тук сме да си помагаме.Аз съм имал пред вид само това.Тези номера от 1 до 10 са събирателно число за характеристиките на отделните лампи.Тук си пише и за ре-биасването.Дано да съм полезен,
THE GT RATING SYSTEM EXPLAINED Understanding the GT Tube Performance Rating System
Many folks who buy our tubes know that we use a special process to categorically rate our tubes so that players can select the tubes that best fit their preferred tones and styles. However, we get a lot of
questions about our rating system, and what the numbers actually mean.
IMPORTANT BIAS NOTE: If you're replacing a tube with the SAME TYPE of Groove Tube (tube model and rating), you do not have to rebias your amp. In any other case, you should always have a qualified amp tech reset your amp’s bias whenever changing your tube type or rating number. Contact Groove Tubes if you have questions about which tube will work for your amplifier, or whether re-biasing is required.