I will heed your advice and anchor it down. It sounds great, much better than my Infinity Basslink sub in my old car. I recommend this sub set up, and it only cost me about $80, I keep it turned down a bit so it doesn't dominate the music.
These Hybrid Audio Technologies Unity speakers seem to lack some mid bass and vocals, I am still making adjustments to the frequencies on the amp, so maybe it just isn't dialed in correctly yet. They are a major upgrade from the factory Bose.
