Nick,
Here is some recent discussion on tubes for that player:
http://forum.audiogon.com/cgi-bin/fr.pl?ddgtl&1112895895&read&keyw&zztubes+jd-100
The 12AX7 is said to last around 10,000 hours in that player. When a tube goes bad, you will likely hear nothing more than diminished sound quality.
You can check out Joe's Tube Lore on Audio Asylum, under FAQ (I believe) to get an idea of the different sonic characteristics of the various 12AX7/5751/etc. type tubes.
If you listen mainly to jazz/vocals/instrumental, I might suggest that you try the Mullard CV4004 or 12AX7 variety. They are quite liquid sounding, milky even. You give up a little when it comes to rock, but not much. If you like a more focused, detailed sound, I would suggest trying out the GE/RCA/Sylvania 5751 tubes. Telefunken 12AX7's also have similar qualities--to MY ear, anyways. In the Jolida, I preferred the Mullards, as I found the music to be most engaging with them. Also, it's important to buy from a reputable source (check the archives). Otherwise, you can end up with bad tubes and/or paying far too much.
Finally, why not hang on to the Rega until you know that you definitely want to keep the Jolida? When we bought our JD-100, we sold our Planet 2000 the next day. However, you may not end up doing the same. Just a thought.
Enjoy,
Howard
Here is some recent discussion on tubes for that player:
http://forum.audiogon.com/cgi-bin/fr.pl?ddgtl&1112895895&read&keyw&zztubes+jd-100
The 12AX7 is said to last around 10,000 hours in that player. When a tube goes bad, you will likely hear nothing more than diminished sound quality.
You can check out Joe's Tube Lore on Audio Asylum, under FAQ (I believe) to get an idea of the different sonic characteristics of the various 12AX7/5751/etc. type tubes.
If you listen mainly to jazz/vocals/instrumental, I might suggest that you try the Mullard CV4004 or 12AX7 variety. They are quite liquid sounding, milky even. You give up a little when it comes to rock, but not much. If you like a more focused, detailed sound, I would suggest trying out the GE/RCA/Sylvania 5751 tubes. Telefunken 12AX7's also have similar qualities--to MY ear, anyways. In the Jolida, I preferred the Mullards, as I found the music to be most engaging with them. Also, it's important to buy from a reputable source (check the archives). Otherwise, you can end up with bad tubes and/or paying far too much.
Finally, why not hang on to the Rega until you know that you definitely want to keep the Jolida? When we bought our JD-100, we sold our Planet 2000 the next day. However, you may not end up doing the same. Just a thought.
Enjoy,
Howard