Just installed my CS300 Hawg Wire Amp, installation went fine until I got to the tuning part. started with gain at zero (volume at 75% per instruction) and slowly increased gain...not even half way up and amp went lost power. pulled in line fuse out - looked ok. put fuse back in and power came back on. started the process from beginning and there it happened again. not sure what's going on ( I am not an expert at this) bad ground or connection?? any suggestion would be appreciated.