Explain what you mean by "My "receiver" is a VCR"...
And now I want to see what your sub looks like! lol
My TV is a 19" from 1988 so it only has an RF in. So my VCR connects to that. Fortunately my VCR has some more inputs, being RF (connected to Genesis currently) and Composite. The composite IN ports are connected to a 4 port switch box (Satellite, PS2, Tape deck and aux) and the composite OUT ports connect to the speaker system. The "aux" port has a 3.5mm jack connected to it so I can connect my netbook, other computer or iPod to it.
Here is pic of the subwoofer.
Untitled by
Tripredacus, on Flickr
The red/white come from the VCR. There other 4 ports are speaker outs. Yes it was very dusty when I took the pic and YES it is partly made out of electrical tape and beer cases. xD