had the same happen with an audiopipe 1k. was weak and distorted, stuck a shuriken batt near the amp, and it nearly doubled in output. Newer gm electrical sucksMy brx2400.1 at 1 ohm barely put out anymore power than a kenwood 500 rms at 4 ohms because it was 4 gauge cca wire on stock electrical. The brx puts out waaaay more in my vehicles electrical with proper ofc wire gauge