No, but I had to replace the PCM56P-K chips in my early production Havanna (solid top, no logo) because the chips were defective and made clicking sounds. It was a very easy operation. Let us know if you do.
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Peter, In having switched out the chips I've noticed a sense of greater seperation of and around instruments within the soundstage, increased airiness of the high frequencies. and just an overall better sense of all that was there originally having been increased. Of course YMMV due to differences in our systems.
Peter I'm one of those curious audio/music lovers. The day can be going along fine, music flowing sweetly and serenely, and than of a sudden I'm wondering how this or that may sound under different circumstances. Thus my having swiitched out the chips. It was quite easy, cost effective, and overall a wonderful upgrade, results being even more than I expected.
I did mine as well. It was a really solid improvement. Gives a better sense of resolution and just a better overall soundstage. For sure it would be one of those things that you don't notice until you do it, and then you can't go back after you do.
It was not hard to pull the old chips out and replace them with the new ones, either.
My previous post prior to the one above did not show up for some reason. I went to (outsource.net,) but it sends me to a different website (outsourcetelecom.com) instead and it doesn't look like this company would sell chips. Is this the correct company? Like I said above, I did find the chips a couple of places at $20.00 each.
Gregg, my apologies for not getting back with you sooner, was off the grid for a while. In any regards, at the time of purchase that outsource site is what I used to acquire mine. I'm glad Eugene81 was able to help out, I've also gone there to order some more, and hope to be enjoying the change soon.....