Believe it or not, I will second the nod for Sk8ter Boi. It is a lame song, but there are a few REALLY deep notes. If you haven't heard it with a kick ***** sub, you won't even know its there.
Also I will second "Armor for Sleep" by Armor for Sleep. The first track off of thier first album has some nice deep tones. Not much "impact" to them, but very deep. No lyrics and its only about 1 minute long. An excelent music test track, plus the whole CD (and thier second one) is/are great.
For deep bass with impact I would recomend almost anything by Soul Coughing. My personal choice would be "Soft Serve" from Issiristible Bliss. It has an excellent mix of Upright Bass with a solid kick drum.
Hey, doesn't this tread belong somewhere else? It is very interesting though.