Yeah I had the E180CC = 6414 in my LS9 Jadis Clone line stage, ( sold 3 weeks ago),, and honestly, I found no sonic gains.
Unit came with EH12AT7's,. I also ran Siemens 12AT7's,, and found no sonic gains.
Honestly as others mention, if the unit comes with AT7's, stay with AT7's.
The budget priced 12AT7's will sound no dif from the high priced Tele 12AT7's.
The 12AT7 is a great pre tube, as it is so neutral sounding, = delivers the music cleanly, w/o distortions. , so stay with that tube as the designer made the circuit for exactly that tube. = The amp will be more happy, = no disruptions down the road. Play it smart.
If you are looking to make tweaks try employing new capacitors, like silver or copper.
Unit came with EH12AT7's,. I also ran Siemens 12AT7's,, and found no sonic gains.
Honestly as others mention, if the unit comes with AT7's, stay with AT7's.
The budget priced 12AT7's will sound no dif from the high priced Tele 12AT7's.
The 12AT7 is a great pre tube, as it is so neutral sounding, = delivers the music cleanly, w/o distortions. , so stay with that tube as the designer made the circuit for exactly that tube. = The amp will be more happy, = no disruptions down the road. Play it smart.
If you are looking to make tweaks try employing new capacitors, like silver or copper.