Thanks cb3489. I am very close to getting the X9 to drive my CW IV. How is the X9 bass control compares to your X7? Roll any tube yet?
No power tube rolling. It has been confirmed that they muzishare branded psvanes 300b. Changed preamps with tungsols. Made huge difference. Bass is very different than x7. If you are in los angeles area you can come and listen:) 
@cb3489, 
I have to believe that the Tekton Perfect SET speakers are a better match with your X9 300b SET compared to the less efficient and sensitive KEFs. What has improved sonically in your opinion (Or am I being presumptuous?).
Charles 
Cool cb3489. I am not far, in San Gabriel area. Thanks for the offer. I will surely swing by one of these days. 
@charles1dad 
KEFs are amazing but Tekton is more detailed and more wider sounding. old vs new perfect example. KEFs each crossover has 13 capacitors and multi stage filtering vs simple crossover with 3 mundorf oil capacitors. My friend brought 1w old Decware amp. These power hungry KEFs both 104/3 and 105/3 did really good too we were surprised. But again Tekton was little more detailed and natural. I also added Tekton 4-10 sub to tekton perfect set 15s. I love lots of bass low volume :)