Would two 12 inch sub-woofers make my 94 Honda accord sound bad?

Would two 12 inch sub-woofers make my 94 Honda accord sound bad? - 1

Added (1). I want either want 1 12 inch sub or both depending on which won't make my car rattle. Which one would be better?

Added (2). I either want one 12 inch sub or both depending on which won't make my car rattle. Which one would be better? The amp i got available is 800 wats.

Is that "bad" as in good, or bad as in awful? Guessing at the so-called "music" you probably listen to, my money is on awful. Even one sub can make a car rattle when it gets into the sub-audible frequencies and the older the car the more likely things are to rattle and buzz.

Aside from that, does your amp put out 800 watts peak power or 800 watts RMS continuous power? At what impedance (ohms) would that be? If you don't know, just specify the brand and model number and I'll look it up. It is the RMS power that is important, so if that is only 800 watts peak power, your amp might be incapable of running two 12" high output subs.

Given that the car's 21 years old, that much vibration might rattle the car to pieces…