Talk to me about the Bogner Uberschall...

[ACShreds]

I played one at a GC around here not too long ago and while i thought it sounded good, it didnt jump out and surprise me or anything. The tone was great and all but i'd rather stick to my cheaper and more versatile mark V.

 

[Hollywood]

I was researching it online and kept seeing all kinds of different versions. Can anyone explain these or give me a brief overview of the different ones. I figured I would ask you guys before I confuse myself looking all over the internet.

Jordan

Uberschall differences

For me, the Rev2 is just right. I think great tube amps (high gain or not) should "breathe" and have a "organic" quality to them. This alone is one reason why I'll never sell my early Dual Recto. When using the tube rectifiers on spongy that amp has that quality in spades. Now keep in mind tone and feel are in the eye/ears/hands of the beholder and very subjective.

This is the basic rundown of the Uberschalls:

Original - Fast gain taper on Gain Channel (some have said almost like an Off/On kind of jump in gain), high plate voltage, good power section compression/sag when pushed, Clean Channel volume slightly lower than Gain Channel by comparison, plastic carry handle (although some Original Uberschalls got the leather handle just prior to transitioning into the Rev2), EL34

Rev2 - Reduced gain taper on Gain Channel (same gain, just more controllable), high plate voltage, good power section compression/sag when pushed, Clean Channel volume slightly lower than Gain Channel by comparison, leather carry handle, EL34

Revision Blue - Same basic gain structure, lower plate voltage, less power section compression/sag when pushed, Clean Channel volume matched closer to Gain Channel, re-design of circuits, addition of Loop volume control, bias test points, power jewel changed to smaller LED type, dedicated design ability to allow power section slaving from an outside source (but this can be accomplished on Original/Rev2 versions), EL34

Twin Jet 1.0 - Gain Channel re-design in a direction towards the Original/Rev2 designs, plate voltage unknown at this time so I can't say, less power section compression (due to the design switch to KT88 power tubes), Clean channel re-do in the direction of a high gain modded Marshall tone with very little ability to get a truly clean sound, addition of power section Presence and Depth controls, KT88

Twin Jet 1.1 - The same as 1.0 but with a modded gain taper on the clean channel, same level of gain available as 1.0 with the ability to go lower gain and clean up better

Now keep in mind, I made up TJ 1.0/1.1 for the purpose of comparison , I don't think Bogner looks at them that way. Bogner does offer to perform the Clean Channel mod for anybody who owns what I call 1.0 at no charge.

These are the main differences I know about. I don't know specific component values between the different versions from a design stand point, but I can say my descriptions above, for the most part, are right on the money by way of research, comparisons and the general consensus from those who have had time with them. The volume difference between the Clean Channel and Gain Channel on the Original and Rev2 seem to be exaggerated. Yes there is a difference, but nothing that can't be fixed by just turning the Clean Channel Volume control up a little more than the Gain Channel volume control. Another words, adjust the amp with you ears, not your eyes.

Agree with almost all of this, one correction..... the first revision was the green revision, this due in namesake from the color of the boards used in the amp... then the rev. blue was the 2nd revision. hence the rev.2 blue....... Correction in namesake only. All other info from this post I go with as the gospel. The input I listed comes straight from the guys at Bogner....

 

[Death by Uberschall]

I was researching it online and kept seeing all kinds of different versions. Can anyone explain these or give me a brief overview of the different ones. I figured I would ask you guys before I confuse myself looking all over the internet.

Jordan

Uberschall differences

For me, the Rev2 is just right. I think great tube amps (high gain or not) should "breathe" and have a "organic" quality to them. This alone is one reason why I'll never sell my early Dual Recto. When using the tube rectifiers on spongy that amp has that quality in spades. Now keep in mind tone and feel are in the eye/ears/hands of the beholder and very subjective.

This is the basic rundown of the Uberschalls:

Original - Fast gain taper on Gain Channel (some have said almost like an Off/On kind of jump in gain), high plate voltage, good power section compression/sag when pushed, Clean Channel volume slightly lower than Gain Channel by comparison, plastic carry handle (although some Original Uberschalls got the leather handle just prior to transitioning into the Rev2), EL34

Rev2 - Reduced gain taper on Gain Channel (same gain, just more controllable), high plate voltage, good power section compression/sag when pushed, Clean Channel volume slightly lower than Gain Channel by comparison, leather carry handle, EL34

Revision Blue - Same basic gain structure, lower plate voltage, less power section compression/sag when pushed, Clean Channel volume matched closer to Gain Channel, re-design of circuits, addition of Loop volume control, bias test points, power jewel changed to smaller LED type, dedicated design ability to allow power section slaving from an outside source (but this can be accomplished on Original/Rev2 versions), EL34

Twin Jet 1.0 - Gain Channel re-design in a direction towards the Original/Rev2 designs, plate voltage unknown at this time so I can't say, less power section compression (due to the design switch to KT88 power tubes), Clean channel re-do in the direction of a high gain modded Marshall tone with very little ability to get a truly clean sound, addition of power section Presence and Depth controls, KT88

Twin Jet 1.1 - The same as 1.0 but with a modded gain taper on the clean channel, same level of gain available as 1.0 with the ability to go lower gain and clean up better

Now keep in mind, I made up TJ 1.0/1.1 for the purpose of comparison , I don't think Bogner looks at them that way. Bogner does offer to perform the Clean Channel mod for anybody who owns what I call 1.0 at no charge.

These are the main differences I know about. I don't know specific component values between the different versions from a design stand point, but I can say my descriptions above, for the most part, are right on the money by way of research, comparisons and the general consensus from those who have had time with them. The volume difference between the Clean Channel and Gain Channel on the Original and Rev2 seem to be exaggerated. Yes there is a difference, but nothing that can't be fixed by just turning the Clean Channel Volume control up a little more than the Gain Channel volume control. Another words, adjust the amp with you ears, not your eyes.

Agree with almost all of this, one correction..... the first revision was the green revision, this due in namesake from the color of the boards used in the amp... then the rev. blue was the 2nd revision. hence the rev.2 blue....... Correction in namesake only. All other info from this post I go with as the gospel. The input I listed comes straight from the guys at Bogner....

Correction on your correction. The Original and Rev2 were both green board amps. I own a Rev2 and it has the green boards just like the Original, only some values were changed. Revision Blue is the 3rd iteration of the Uberschall with the blue boards. Rev2Blue is a joke I made in this thread in my signature:

Amp GOD Warning: Death by Uberschall hurts like a MOFO!!
The Amp GOD Chronicles (EBAY idiots!!)

Oh that thread was soooo much fun,.................

 

[Hollywood]

I stand corrected. I think ? Maybe confused on what Charlie at Bogner said, that Reinhold may have said, that Charlie spoke to me etc.. .
I do know that the Rev. blue amps should best I remember have the blue boards?
I think....................... I have a Rev. Blue currently in studio and another Revision Uber packed away in storage. The boards are Green in that one I do remember.

 

[Death by Uberschall]

I stand corrected. I think ? Maybe confused on what Charlie at Bogner said, that Reinhold may have said, that Charlie spoke to me etc.. .
I do know that the Rev. blue amps should best I remember have the blue boards?
I think....................... I have a Rev. Blue currently in studio and another Revision Uber packed away in storage. The boards are Green in that one I do remember.