Thought I was taking a holiday from the thread, but I just can't seem to stay away...will be in trouble 'indoors' if I'm not careful (live dangerously, I say!).
However, there's a couple of points I feel I need to make :
Firstly, after looking back over some of our (myriad) posts, I realised that you - MORDY - were way ahead of your time when you tentatively proposed using 6SN7s as power tubes...and which you - GIBOSI - then made possible with your experimentation with external heater power supplies.
This thread and all LD I to IV owners interested in taking their amps to new heights do indeed owe you both a great debt of gratitude...and is certainly 'one in the eye' for the experienced guy who wondered why we were bothering to do what we have been doing without checking out all the pure 'technicalities' involved...had we done so, we probably would never have dared to carry on, lol!
Secondly, I am now fairly sure I don't need to 'move up' to a Bottlehead Crack...milosz, over on the Little Dot MKIII review thread did a very interesting A/B comparison - with the BH (plus speedball upgrade and better caps) only marginally ahead. And this with only stock tubes! Given my IVSE, with C3GSs and Chatham 6AS7Gs (as if you didn't know lol!) is a million miles from stock sound, I doubt VERY MUCH - IMHO - whether the BH even matches what I am now getting. I really do believe I would need to spend BIG BUCKS to get any noticeable improvement...am I deluding myself? Possibly, but this past year with all you wonderful guys has taught me more about 'sound', its reproduction, and music appreciation than I ever imagined possible. And I can finally appreciate more as a whole the finer points regarding what my ears (and brain!) are hearing - beyond the more 'technical' aspects of sound.
Whatever, I continue to be amazed at what this amp is now doing...and this, long after the initial 'honeymoon' effect that can often happen...
Cheers to you all...
Edit. Forgot to post milosz's link...silly me...:
Edited by hypnos1 - 6/13/14 at 11:16am