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Convergent Audio Preamps

I need some help understanding the line up of CAT preamps. I see "SL-1", "MKI" , "MKII", "MK III" "signature" and "ultimate" all over the place. Are these all various historical iterations of a single preamp, or are are they different models offered at the same time?

How many current products in the line? Would someone mind tellign me the historical sequence... and if possible, how each subsequent iteration changed the overall character?

THANKS! Art
artg
bombaywalla's avatar
bombaywalla
1,957 posts
 
Artg,
the input linestage tubes in position V6, V7 are more important than the V10 position of the 6922. So, try the pinched waist 6922 in those positions 1st.
FWIW.
artg OP
362 posts
 
thanks bombaywalla! That is exactly the info i was looking for. Just curious, ever roll the tubes in yours? Art
daveyf's avatar
daveyf
1,174 posts
 
Artg,
i rolled the tubes in my SL1 Sig into NOS GE smooth plates and Russian rockets in the Phono stage. Hugh difference!! Waaaay more dynamic and much quieter with greater air and extension.
Having heard the Ultimate but not the Ultimate 2, I personally do not feel there is large difference now.
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