WOW! Thanks guys for the tremendous amount of information. At present I still have the Harbeth's hooked up and they are sounding better (I think?). I purchased them new and I didn't hear any difference up to 100 hours. They now have approx. 150 hours on them and I am hearing a little more opening up of the two tweeters. A little more sizzle & snap as I prefer. Harbeth states in their manual and online that their speakers require very little break in (several hours) except for the supertweeter. Maybe they're right but I am enjoying them more. Also, I bought a brand new interconnect which went into the system when the Harbeth's were reaching 50 hours of burn in. As for the Spendor D7, I decided to purchase a brand new pair of Focal Kanta No. 2 towers from TMR Audio who also are selling brand new pairs of Spendor D7's. I will be starting a new discussion: Harbeth Super HL5+ vs. Focal Kanta No.2.
Thank you all for your comments!
Thank you all for your comments!