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I really like my M90 but would like to move it a bit more to the organic side and get rid of some of the metalic top end that KT88's are known for. Anyone experiment with a change to 6550's? Is this possible with just the bias trim pot in the amp? Thanks

I'm using 2 basically identical Suhr std Pros in my band, both mahogany Pro's one w/510 bridge and one with Gotoh Floyd for Eb tuning, other is in std tuning. I can't seem to keep the 510 in std tuning in tune, I've tried graphite, nut lube etc and still it goes out of tune too quick. Playing...

Playing my 101B last night and when I went to change channels I ended up with both green and blue on at same time, switched channels then had blue and red lit at same time. All LED's on Ft Switch light and seems in order but tried another foot controller and then it was fine...Other than the...

I have a crackle noise in only clean channel of my EL34 20th XTC. I changed both P1 and P6 that are the tubes for the clean channel and it happens also when loop is in or out. Both blue and red channels seem fine, no noise. I'm out of ideas, any thoughts anyone? All preamp and power tubes are...

Hey guys, minor issue but when engaging the higher gain modes in blue and red I hear a faint ringing like feedback from a mic might cause. I replaced V1 and tapped on all the other pre's and nothing seems to influence this sound. The higher the gain or adding the boost seems to make the ringing...

I A/B'd my two XTC's last night and I was pretty suprised at how close they were. Yes the clean is better on the 20th and the blue was a little less conjested but the red was very similar, the older XTC being believe it or not a little richer and more girthy in the mids (I play alot of more...

Want to use one the two Ernie Ball volume pedals I have, I have the regular guitar one and I also have the 25k ohm version....which is the best to use in the loop of my einstein or Herbert? Thanks

For my XTC (or any of my amps for that matter) and for use in the loop, should I use the 25K version (high Impedance I'm assuming) of the Ernie Ball volume pedal or the normal 6180 guitar level version? Thanks

I have a 101B that differs from most aI have seen as it has an attached power cord, a 3 symbol (not numerical) serial number and when I changed headshells this weekend I noticed the transformer oposite the input side was a Mercury magnetics. Is this an early model? What else can you tell me...

How can I tell when my 101B was built as the serial number is just a bunch of symbols? Thanks, Bob

Anyone who owns or has tried both, can you tell me what the main tonal differences are between the two? Thanks

Last night my loop just quit, click the switch and nothing, no LED or anything. Plugged in my FS from my 101B and while it lit up the LED was flashing and I could hear a relay clicking on and off. Put the correct FS back, nothing...anyone have any idea what I should be looking for here? I'll...

Hey all, just got a 20th aniversary XTC and I've encountered a few issues which maybe someone here can help. I use a pedalboard with a few high quality fx in the loop. These are a TC Chorus, a Strymon reverb and a TRex delay and am using the loop in serial mode. To hit the pedals with the right...

Aree the tube retainers (clip type) that come stock on Diezels just screwed into the chassis or is there a nut on the other side? In other words if I want to replace or put new ones in, what is involved? Do I have to remove the PCB to get to the back side to get to the nuts? Thanks for the help.

Perhaps someone has had both and can tell me what the tonal differences are between these two if any. I am looking for the most organic version of VH4, sweeter not hard or harsh high end. Thanks

All of a sudden my Einstein has developed this high end fizziness, very light but there nonetheless (very high frequency, like a light sizzle-11k-13K ish?) that I have never noticed before. It bugs the crap out of me since this is what I hate about most other amps I have tried (almost all Mesa's...

On my Einstein (which I love BTW) I have an issue when using my clean channel mode one where my bridge pickup seems to clip the clean signal when played hard. It makes no difference where the channel gain is set at, it still occurs and is not real pleasing to the ears. Guitars are all John Suhrs...

My einstein was working fine until tonight. Channel one mode 3 (mega I think) has stopped working...sounds the same as mode 2 Texas. I flipped the switch several times, opened her up and don't see anthing wrong. I do have the switch mod on mine but doesn't change the sound from texas by either...

I was playing for a while, left the room to check something on the computer, a little while later I hear this low frequency sound, didn't think much of it since the TV/(suround sound and sub) and my computer were both making noise, came back into room and Einstein is dead...power on switched but...

What is the latest from Herr Diezel? I changed to JJ KT77's as he suggested a while back and while I liked the sound first I had 2 red plate within 3 weeks and now one of the last two has done the same. The dealer I am dealing with (Doug's Tubes) has offered to replace all 4 for me with my...