I just got this AKG C636 and test it on two rehearsals with my band . And also with some backing tracks. I sing and play guitar .I use this with my Play Acoustic from TC Helicon . I must say the quality is great. It sounds professional. I compared this one with Audiotechnica AE 5400 which is a very good condenser , too , with great definition . For me , the winner was AKG C636 . Makes me sing more relaxed , with more pleasure . I totally recommend this . Of course every singer has his or her preferred microphone (s) . Before this I used , and I think I will continue to use it , from time to time , of course , Beyerdynamic Opus 87 . Great definition all the way . But some problems with the plosives and the feedback rejection . Not the case with AKG C636 .