Harp Attack V2

Expected a little more range from 0 to full gain. But a really handy item and great sound.

Harp Attack V2

Well Built. Using as amp substitute into clean PA. Green Bullet Mic into Harp Attack, delay, DI. PA. Drive not at all the distortion that I hear on the YouTube Harp Attack demo video. (even with the drive turned all the way up) I am thinking I may need to increase the signal to the pedal to push the tube? I often use a shaker Madcat mic that has a weaker output and I definitely feel could use a signal boost. I have tried a guitar distortion pedal and a compression pedal to boost the sound. Both of which tend to feed back. Any suggestions on how to get more distortion without feeback?