TC-Helicon VoiceTone T1

In a small stage or rehearsal space this thing will begin to feedback even before you connect the socket. It does its thing compressing the sound but the problem is that it will feedback very fast. I tried it in the rehearsal room and had to turn in off as it began to feedback way before I got the vocals to the volume I needed. Maybe if used with an eq with which you maybe could carve the offending frequencies if could be of use. But as it stands and for what it aims to do, it became useless to me.