Since I've gotten involved with these guys I've had nothing but success everything from a beautiful vintage 1970 Marshall Major that I still use to this day playing bass through it as I had done since the day I purchased it in 1978... Even my text said these are fantastic quality tubes exactly balanced quad set of kt88s a long with a three little sibling preamp tubes. I was fighting for the correct sound that on my 59 fender basement Tweed which I also used to play bass through to various suggestions as well as even getting a set that did not correctly correspond with what I was looking for they gladly accepted the tubes back and set me up with the correct ones until I found the perfect match thank you especially Michelle the girl knows her stuff!
Thanks for your feedback Charles! Let us know when we can be of further assistance! Cheers.