NEW SILVER SERIES TUBES. Groove Tubes Silver Series are tested and warranted to meet or exceed factory specifications.. Silver Series tubes are excellent for "normal" tube replacement applications and offer exceptional value.. Not recommended for the critical high gain V1
The Classic pentode power tube used in Marshall, Hiwatt, Laney, and similar Euro type amps. These tubes have a big bottom and a crisp top end that get crunchy when pushed hard. It also has sort of a hollow midrange response. The choice of the modern rockers, ala British Rock & Heavy
This Russian made pentode is standard issue on many UK amps and has great durability, although as with most Russian power tubes the break up is a bit harsh and they lack high end as compared to the true European models. Newly exclusive GT design, close copy of classic Mullard type