Groove Tubes GT-12AY7 Select Preamp Tube

if buying to "tame" a Blues Deluxe Reissue try instead to use the amplifiers knobs and buttons along with your instrument's knobs. This did reduce gain but it was not ideal based on my ears. I put the 12AX7 back in and now enjoy the amplifier just fine. Stop reading forums.

This single tube in preamp position V1 turned my fizzy, too much gain Marshall DSL20 head in to just what I was looking for. The gain is still meaty and has great harmonics but it now sounds much more like a hot-rodded JCM800 or Jubilee to me. I tried a half dozen recommended preamp tubes first but this one did the trick. It was too much of a gain reduction for my DSL40CR however. I think that amp would benefit from a higher output version of this tube. It may be due to the DSL40 having more channel voices. The green OD channel on it already offers a reduced gain dirty channel. But for Marshall DSL amps without that feature, I recommend you try this tube.

Very nice

makes all the difference in using cascaded for harmonica instead of guitar

Very Good

I added this in the V1 slot to get a better sound with less gain in my Fender Blues Deluxe reissue. it did help, but not as much as I had hoped. i think the sound is good, but it is still very base heavey and the highs can be a bit much. next upgrade will be the speaker. i did however find that put using input 2 to plug into, that actually made a world of difference. i really love the tone and volume levels i am getting now.