Hmmmm, "stupid enough"? Isn't that a bit harsh? It looks like Romy did not read the posting very well here. Since the LP sound changed for the worse even though the CD sound was unchanged, the focus should be of course on the TT/Arm/Cartridge/PhonoStage in the Hovland. Since the MM input is being used, I highly doubt this is susceptible to major changes in power vs the CD sounding as good as before. Is the Hovland MM stage that poorly designed? I doubt it. Perhaps a super low output cartridge might be more vulnerable to this.
It's not easy to analyze the change to thin and bright however. Generally when something goes astray in my system, the sound is more 2-dimensional as in a loss of harmonic richness. I swap tubes between channels and with spares to try and remedy this. Or the issue is an increase in background noise. This once was due to the shield on the phono connector not being tight. A quick crimping and re-solder and all was back to normal.
With a Koetsu cartridge, I could hear the slow degradation of the sound as it reached its end of life. One night the sound was suddenly greatly reduced. But again, it was not bright but rather the opposite. All the magic of the system had collapsed like the sound of the first generation of CD players.
You do not mention if the problem is one channel or if equally poor in both. Try disconnecting and reseating the phono cable. Also a quick visual inspection of the stylus and cantilevel is in order.
A visit to your local audio shop with your TT would save a lot of guess work on where to focus your attention with this problem. It could very well be the cartridge was faulty. And why not have the dealer assess this for you?
Hope this gives you some ideas.
John
