I agree with Detlof regarding his comment, I think the picture you see is made for advertising purpose only, in fact I have the same pre-amp you have and I always turn it on two to three hours before playing time and the three tube that I have were 6922 not 6dj8, I did talk to one of the sunfire technician and they informed me that 6dj8 is not the best tube for sunfire.
I got my audio know-how from audiogon people who are very kind and nice to share their knowledge specially to a WOMAN like me.
I got my audio know-how from audiogon people who are very kind and nice to share their knowledge specially to a WOMAN like me.