all component speakers will lose bass with a stock headunit. The stock speakers are full range, where as yours are DESIGNED to filter out lower freq., thus having a crossover. It is normal. If you really want more bass, just bypass the crossovers.

 

OK, got it. I had assumed that the woofer was a multi voice coil so it would pick up mids and lows.

 

phase.

less bass from the stock speakers -- Dave (i think) is right, but since he was a bit cryptic... here's my version, which will hopefully be a bit more clear...
typically for a set of components (2-way), there's a single crossover point, and above that point -- the signal goes to the tweeter, below the point, the signal goes to the mid/bass, thus the mid driver will produce less sound (no high frequencies) than previously.
most likely -- your loss of bass comes from a reduction in efficiency from the stock to aftermarket speaker. the stock speaker is MUCH more efficient (designed to work w/ 10 Watts or so) whereas the Infinities (still more efficient than the average aftermarket) are less efficient than the OEM, having been designed to work w/ higher power levels (and aftermarket amps). plus, the OEM speaker only had a crossover component (capacitor) inline w/ the tweeter, so there were no power losses through the crossover for the mid/bass driver. combine the efficiency reduction w/ the crossover losses and you get lower performance, but cleaner sound.
an aftermarket HU (your Eclipse) should clear up all the problems and bring those babies to life.

i seriously doubt that driver is a dual voice coil. and the number of voice coils has little to no effect on what frequencies are produced... at least not in the way you're implying.
not trying to be a weiny, just clearing the air.

 

that makes more sence. OK, now I get it

thanks PJK3 and NFR for the assistance I really appreciate it

 

Thats why consumer reports rated the electronics section the best on s2ki.

 

yer funny dave.