Diff Ohm Load, Same Amp?

Wasup yall,

okay heres the issue.  will running two 4ohm speakers(boston fx7's) and two 3ohm speakers(boston pro60's) of the same amp(alpine MRP-F240) casue any issues like blowing my amp or speakers or anything.  i got them hooked up now and they sound good but im not sure if this will cause me trouble.  also since the amp is 40wX4 at 4 ohms and 50wX4 at 2 ohms what would the amps power be running in this setup?   also would hooking up the fx7's to the hu so i could bridge my amp to run at 100wX2 for the pro60's sound okay.  yall think it would sound funny runnin two speakers off the hu and the rest off amps?  any suggestions would be greatly appreaciated.

thanks

ben

thanks for the reply rushman.

okay to be more specific

Alpline CDA-9827 H/U which i was thinking about hookin up the 2 boston fx7's to and then run the boston prod60's off the alpine mrp-f240 amp bridged and my two 12" JL W0's will be connected to kendwood kac-7201 amp bridged.  will this over power the highs since the rms on the hu is only pushin 18watts rms.  also will it mess with the front, rear and center channels??? 

thanks

thanks 4bidden.  will the wattage be equal to all four speakers or will the 3 ohm's get more juice.???

To reply to the first question below my last post this is a good idea as well. It will definitely give the front stage much more authority. Should you go down this path a good set of 200uf caps inline on the + speaker lead to each rear speaker will act as a basic crossover to keep the damaging lower frequencies at bay.

For your second question the wattage will not be equal to all speakers but don't worry about that. This is due to the fact that the speakers will be mounted in different locations, may be of differing efficencies and of course the gains on the amp need to be set so that the rear speakers are not drowning out the front speakers.

thanks guys,

well the boston pros came with xovers.  would i still need the caps?