Hi,
Last year i swapped tubes, 2 days ago i noticed air movement trough the speakers so ill be swapping again. TBH im gonna get a set KT77 again.
This is my post after changing last year:
Ok so while I was waiting for tube replacements I had 4 El34 and 2 kt77 running. IT sounded Ok but I thought id give the sixtet kt77 a change again. My head was stil out of the casing so why not.
Biased 3 pairs between 70 and 71.
My tone was amazing!
How could this be?
Well, I had a tube change and new strings so my sound was quite sterrile before and just amazing now.
Its been a week almost so here are my findings:
Clean is really clean and has more sparckle
Ch2 is punchy, raw, open and mean.
Ch3 is more open and singing
To get my tone how I liked the El34 i only had to lower the pressence just a bit, instead of 13:00 Its now on 11:00
Overall the difference with the El34:
Less compression so I have a more open tone
Better note clarity when playing single lines or riffing
Tighter bottom end in a really good way, Less boomy
A tad lesser mid focused sound.
While im waiting on my El34's to arrive again I Dont think ill be putting them in now
Maybe my bias was also a bit off before, who knows but right now I can say the kt77 improved my herbert. Im also using a bit more gain on the Chanels but the clarity is amazing and these tubes have a wicked grind to them.
I stil had the El34 sound in my head and the moment i changed them again, simply put Its like I removed a blanket from the speakers. I always wanted a bit Less compression and this did the trick.
If you love your El34 but have kt77 tubes please give them a try. Lowering the pressence did wonders for me.
And im starting to prefer them much more then the El34 BHT.