I found this on ebay:

Rockford amp

and was wondering if this would be a good option to amp my front speakers. Right now, they're just stock, but eventually will probably upgrade to either a component set, or just another nice 6.5" speaker option. I'm not an audiophile or anything, I just want to improve the sound quality. The amp is a refurb, which really doesn't bother me because it's only $18.50 shipped, and they have great feedback. 75x2 at 2 ohms... not sure what the 2 ohms means, but 75x2 is more than enough wattage for the stock fronts, and enough for most aftermarket 6.5's. So anyway, could anyone recommend whether or not to buy this amp, keeping in mind what I said I'm looking for? Thanks!

 

I could be wrong but this is a sub amp. Usually 6.5's are 4 ohms I believe, and I'm not sure if running them at 2 ohms will hurt it. I believe better could be bought unless you're getting this amp for the 32 bux since its still a refurb.

 

ajkewler -- sorry , but you are a little off. this amp can function full range, but it is probably best suited for light duty sub work.

ajkewler and Speed --
to clear things up a bit...
the amp's output will depend upon the resistance (measured in ohms) of the speakers. amps try to output what power they can (and being stupid) they generally don't limit what they "push" (output). they depend upon the speakers to resist the "push". so, if you hooked up the speaker leads to each other, thus creating almost no resistance to the "push", the amp would burn up trying to "push" too much. does this make sense?

now, most component speakers are 4 ohms, not 2 ohms. so the power rating of 75 Wrms x 2 @ 2 ohms is misleading. without getting into a whole lot of details, the general rule goes:
Stereo Wattage @ 2 ohms = 2 x Stereo Wattage @ 4 ohms
and
Bridged Wattage @ 4 ohms = 4 x Stereo Wattage @ 4 ohms
(all watts in average power - also known as Wrms or continuous).
this is a general rule of thumb, and doesn't always hold true... but...

now Speed --
using the general rule of thumb -- that means that for the typical set of 4 ohm 6.5" components, this amp will actually output 37 or 38 Wrms for each channel (37 Wrms x 2 @ 4 ohms). not a whole lot of power... but if you're just doing a mild upgrade - not a small amount of power either. i wouldn't run stock speakers w/ that power.

still, buy some relatively efficient components (with a sensitivity equal or greater than 90 db/W/m) and pair them w/ this amp, and you'll find yourself w/ a nice gain in volume and clarity. bang for buck, it's probably not a bad deal. just don't expect earth shaking or ear piercing volumes.

edit: bad typo