so ive been talkin with my other guitarist and hes sellin his mesa studio preamp and mesa strategy 400 poweramp to get a dual rec with kt88 and kt66s. now with that it runs perfectly fine no mods no nothing and just run it on the 6l6 bias part. Now what ive been woundering is can i use a simlar type of tube combo or will it **** my head up to no return? Plus ive wanted to get the el34 cut with the 6l6 balls i know ive asked before but im still very very scared about putting both tubes in my amp. But the mark iv allows this why cant the mark v? also im only playing in 90 watt if that helps
Mark V and KT88s??
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The new Mark V amps use either a quad of 6L6's or EL34's, a single 5U4 rectifier, and seven 12AX7's. Because of the way these amps are setup we have not had great luck tonally spekaing with integrating 6L6's and EL34's. Here is a brief description of the options we really dug:The standard JJ EL34 is just like the old European EL34's. These are a bit soft with a shallower low end and a smooth breakup with a nice crunch, a typical high quality EL34.
The JJ E34L's provide a deeper low end and are more aggressive and punchy than an EL34. The E34L is tighter with slightly more headroom and power with a more aggressive crunch, a very articulate British tone.
The JJ KT77 is tighter than an EL34 and they have a very deep low end extension with a nice sizzle in the top end that is not brittle. The clean tone is very fat and full and the crunch has more of a chunk to it and it's very punchy and more aggressive than a standard EL34, a great tube for rhythm and solo work.
So for a comparison the JJ 6L6GC's have about the same low end as the KT77's but are a cleaner tube with a later breakup, and they are not as mid range heavy. More of a traditional Fender type tone. The 6L6GC's are a good way to go if you scoop your mids, and these are a great tube for heavy rhythm and melodic drop tuned metal.
Another option would be to use a pair of 6L6GC's in the inside sockets along with a pair of the KT66's in the outside sockets. This setup will get you a more aggressive mid range while still retainign a very deep and tight low end. This would add 38.00 to the "6L6GC" quote below.
JJ Electronic now has a great new production 5U4GB with dynamics equal to the old RCA 5U4GB, not too stiff with just the right amount of sag. These are a very nice upgrade from the stock 5U4.
For the front end
we usually use the JJ ECC83S's which sound very fat and full. I would use a balanced ECC83S in the phase splitter hole which is the preamp tube that's farthest from the input jack. This will eliminate any dead spots due to phase cancellation.
The only other option would be if you want any of the preamp tubes premium graded for gain. The high gain ECC83S's have about 10% more gain than standards which adds a bit of bite and a sharper dynamic but does not hurt the clean tone. The other attribute that these tubes have is a faster filament rise time which is great for an EVH, Petrucci or Satriani type style, and is also good for fast palm mute and metal styles. If you decide to use these I would use them in the first three positions which would add 12.00 to the cost below.
now i dono what set i want lol
The new Mark V amps use either a quad of 6L6's or EL34's, a single 5U4 rectifier, and seven 12AX7's. Because of the way these amps are setup we have not had great luck tonally spekaing with integrating 6L6's and EL34's. Here is a brief description of the options we really dug:The standard JJ EL34 is just like the old European EL34's. These are a bit soft with a shallower low end and a smooth breakup with a nice crunch, a typical high quality EL34.
The JJ E34L's provide a deeper low end and are more aggressive and punchy than an EL34. The E34L is tighter with slightly more headroom and power with a more aggressive crunch, a very articulate British tone.
The JJ KT77 is tighter than an EL34 and they have a very deep low end extension with a nice sizzle in the top end that is not brittle. The clean tone is very fat and full and the crunch has more of a chunk to it and it's very punchy and more aggressive than a standard EL34, a great tube for rhythm and solo work.
So for a comparison the JJ 6L6GC's have about the same low end as the KT77's but are a cleaner tube with a later breakup, and they are not as mid range heavy. More of a traditional Fender type tone. The 6L6GC's are a good way to go if you scoop your mids, and these are a great tube for heavy rhythm and melodic drop tuned metal.
Another option would be to use a pair of 6L6GC's in the inside sockets along with a pair of the KT66's in the outside sockets. This setup will get you a more aggressive mid range while still retainign a very deep and tight low end. This would add 38.00 to the "6L6GC" quote below.
JJ Electronic now has a great new production 5U4GB with dynamics equal to the old RCA 5U4GB, not too stiff with just the right amount of sag. These are a very nice upgrade from the stock 5U4.
For the front end
we usually use the JJ ECC83S's which sound very fat and full. I would use a balanced ECC83S in the phase splitter hole which is the preamp tube that's farthest from the input jack. This will eliminate any dead spots due to phase cancellation.
The only other option would be if you want any of the preamp tubes premium graded for gain. The high gain ECC83S's have about 10% more gain than standards which adds a bit of bite and a sharper dynamic but does not hurt the clean tone. The other attribute that these tubes have is a faster filament rise time which is great for an EVH, Petrucci or Satriani type style, and is also good for fast palm mute and metal styles. If you decide to use these I would use them in the first three positions which would add 12.00 to the cost below.
now i dono what set i want lol
ryjan
Well-known member
I have a pair of EL34L's that I run in my Mark IV that sound great. I'd start there.
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