Thank you for your replies. This place really seems to be very newbie-friendly and I'm sure I'll get lots of usefull information in the future too. I just gut my Edirol r-09HR in the mail yesterday and can't wait to get a chance to test it, even with my old sony mic.
That comparison posted by Tonedeaf really is quite amazing. Makes me wonder.. I actually do have small Soundprofessionnals cardioids and a battery box, but I quit using them at some point as I never got satisfactory recordings from loud live shows. Always when the volume and/or bass was very loud the mics seemed to overload and cause what I belive is referred to brickwalling in some other threads (english is not my mother tongue, so I wasn't previously familiar with that term). I only got decent quality recordings from acoustic shows or some small venues in which the volume isn't that loud.
At some point I quite stealthing with the soundprofessionals mics and only recored when I happened to get a permission to plug my MD into the soundboard.
For example, I had the mics at a Smashing pumpkins show in my city in 2000. It wasn't that easy to get them past the security inspection at the door and not really worth having the trouble of smuggling them in and recording when the result was that only one song they did acoustic sounded good. All the rest weren't really worth listening to at home. I have also wondered if the battery box with bass roll-off was ever working properly. The instructions said that I should use the line-in of MD/DAT or whatever I'm recording with but I didn't get any sound from the line-in and instead had to use the mic-in of my MD. I'm pretty sure it wasn't the MD's fault as I used the line-in for soundboard recordings and never had any problem with that.
Anyway, I'm guessing that those CA-14 mics are lot better than the ones I bought in 2000. Can I use them without a external battery box? Or would that require some mod as suggested in the post above?