I'm going to do a twofer today because I am been in a nostalgic mood, musically speaking, at least for old skool techno, and here are some gems that I remember fondly from that era.
Here is an old skool house tune with a pretty impressive bass line when you consider it was produced in 1991:
Egma - Let the Bass Kick. Great vintage techno music! With a meaty bassline that digs down to the low 30's, which is pretty much unheard of for that time period and music genre. It still sounds great today.
Here is another great from the old skool with a nice thick bassline:
Skin Up - Blockbusters. This tune is known by a few different names since it released multiple times. The beginning has a sample from a popular British gameshow that turns it into a drug reference. Supposedly when the Gameshow host heard the tune, he thought it was funny use of his show. The bassline is not quite as thick as I remember, probably because most of the times I heard this was when running the bass hot in my car system. The tune still sounds fantastic to my ears though. Run the bass very hot to get the full effect!