Smooth tubes all through out the tonal spectrum
I initially had issues with these tubes being to to bassy sounding, but i have a handful of preamp tubes, and decided to go back, and experiment. I had to take out the JJ 12ax7 out of V1, and went back to the Tung Sol for that position. In the V3 position i like the Tungsram ECC83 for my Coreblade. I find that these three preamp tubes really work well together, and help the mid knob get a airiness type mid range that doesn't overly affect the bass, and resonance adjustments on the amp. With my previous EL34b power tubes these preamps tubes just wouldnt' work because they eliminated all the bass frequencies, and since I added the KT88's I was able to get all those bass frequencies back, which is awesome. I find I can turn up all my amps tone adjustments, and affects adjustments to the max settings, and still get a good sound. I don't have nearly as much percussive pick attack as i did previously, but that is more because I replaced my Jensen Blackbird/ Tornado speakers, with Warehouse speakers ET90, in my Port City OS Wave 2x12, which i find is brings out smooth lead tone instead. In order for me to get any semblance of percussive palm muting attack on my A standard tuned Reaper I have to dial back the resonance,, and bass parameters a lot. I might possible in the future try out a Vintage 30, after i try adding a compressor to my sound to see if i can bring the percussive back for the certain rhythm I like to use it on. I moved the Dimarzio D activator pickups on my guitar as far away from the strings as i could, and raised the Poles as close as i could get them to the strings to help further reduce the bass that i get from my 27" scale mahogany Agile Reaper. This helped clear up the bass on the Bridge pickup some, but i still have issues with the neck having more bass then i care for, so I think I'm not going to use it much if ever. I found with the KT88's i can get a really good warm but not dark lead tone with the bridge pickup on It's own, with some minor amp tone adjustments which is sweet. Overall I'm pretty happy with the sound I'm getting with my amp after these changes. They have been a great improvement.