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I use =C='s almost exclusively, especially when gigging. Occasionally during recordings I switch to NOS RFT/Siemens or NOS Tesla. =C='s are the most ballsy and complex, and RFT's are more bright and cutting (I always record solo's with these). Tesla's are close to =C='s (both are based on...

Bogner has redone the amp quite a lot. Here are some basic data. First of all, 1st and 3rd coupling caps (C1 & C14) values has been changed to 10nF (101B - 4.7nF) and to 2.2nF (101B - 22nF). Doing that he let lows coming earlier into the circuit (more n's in CC - more bass going thru) and cut...

Funny :). During last rehearsals I replaced EHX in V2 & V3 for GT chinese too. Really like the sound. Before modding my amp chinese seemd to me muddying the tone. Now they simply shine, beefy but very cutting. They match very well with LPS in V1 and PI. Regards, Andy :)

Try LPS in those spots and EXH or chinese in gain stages.

I have had a chance to try GE tube. It wasn't very strong one, but AFAIR it was quite nice, very balanced, no so aggressive. As for the PI, I didn't like EHX there. That tube has too much gain and used as PI made my amp oversaturated. But try it in Your amp to see for Yourself. Huh, XTC is...

Funny, but I felt exactly opposite as for the "blanket effect" :). But tastes, tastes :). I have tried nearly all tubes possible, NOS and CP. Ended up with line-up described above, as I wanted my amp to be the most aggressive. But even during my NOS days I have always kept LPS as a PI. I used...

In my XTC (hard rock sounds) I currently have: V1 - LPS, V2 - EHX, V3 - EHX, V4 - EHX, V5 - LPS, V6 - LPS. That line-up gave me the most aggressive and upper-oriented sound. RFT in V2 & V3 are also cool, but sound more rough. EHX are more creamy, but You got to watch Your gain knob while using...

It is partially similar to Classic and partially to 20th Ann. It has 1st dirty CC .0022uF, 2nd gain stage 2k7//1.5uF and Structure circuit removed as it is in Classic. Also dirty signal and coupling caps are now all film-to-foil polyester caps like in 20th Ann. My ideas are: 1k5//1uF in 1st...

Sure. Send Your serial number to Bogner and they'll tell You whatr year is Your amp :)

Congrats Mate, great amp! :). Red channel has never been modded as there's no sign of soldering anything to R12. Which is good news :), first mod I did to my amp was removing factory gain mod. Actually I installed Marvel Mod shortly after, but I barely used other setting than pre2004 and...

I changed PI output caps to remove most of the muddying low-end, which caused "blanket effect". 100nF is way too much, lets too much bass go thru. It is a value which was put by Marshall to JMP bass amps. The main cause of a change (actually of all mods done) was that I was getting lost in the...

Hi! You're right, I am the very same Setneck from Bogner forum. Shame that it is dead for a very long time... As for the clips, the modding trial took me nearly a few months, I have worked on my amp step by step, changing parts and testing the tone, with a few things that was reversed. It was...

The easiest way is to implement Marvel Mod. You can read about it here: http://bognerampforum.informe.com/viewtopic.php?t=1225 And it looks like this: If You want manually add components to Your circuit here's a tutorial: http://bognerampforum.informe.com/red-c ... dt967.html Regards, Andy :)

Impossible to please everyone... I thought that everyone knows how "regular" XTC sounds, tons of clips on YT, and that is why I recorded my amp modded only.

Clips: RFT/Siemens: https://www.soundclick.com/player/single ... 84552&q=hi =C='s: https://www.soundclick.com/player/single ... 84553&q=hi Don't mind my crappy playing but hopefully You'll get how the amp sounds after the mods. Regards, Andy :)

Further mods done to my amp. Changed 1st CC to 2.2nF (TAD/Mojo Dijon) and output caps to 22nF (Mallory 150). The flubby bass was reduced quite a lot I must say. But I'm gonna give it some time to get used to it. Eventually I will raise 1st CC to 3.3nF or return to 4.7nF. But no way back to 100nF...

As for the powertubes the choice seems to be pretty obvious: =C='s :). As for the pre's, if You need more smoother gain You may try Tung-Sol Reissues. In XTC they give nice warm distortion, very rich harmonically. But be careful with them in cathode follower positions (V3-V4). They may blow...

I have just return from the Marvel Amps HQ with my modded XTC. Totally new amp! The essential change was removing all polypropylene coupling and tone caps for dirty channels and replacing them with TAD/Mojo Dijon polyester film-to-foil caps. Man, WHAT A CHANGE!! The amp is now hairy, aggressive...

Hi! It's about 515-525VDC. Regards, Andy :)

Hi! I made some short clips how the amp sounds now. As yet, I ended up with such mods: - 1st dirty stage cathode: - 1k5//1uF (stock: 820R//.68uF) - tried 1k8 here but it was too thin. - 2nd dirty stage cathode (Structure circuit): 4k75 + 6k8//.68uF WIMA MKS2 (stock: 4k75 + 4k75//1.5uF...