power needed for 8 ohm car mids?

[squeak9798 5,000+ posts]

In this case, the 4 ohm driver is more sensitive

Only by ~1db......

 

[Lil Poot 5,000+ posts]

my mids are creative sdx7's, they're like an updated adire extremis. xbl^2, will take over 150w rms a side. what i'm thinking of doing now is bridging my usa4050 to the mids, and buying a usa2150 to match it and run my tweets.

http://www.solen.ca/pdf/css/sdx7.pdf

i'm a little worried about that not being enough power and me just wanting to upgrade again in the future though, so i may end up using the 4050 for the tweets if i can find a big power, small footprint 2 or 4 channel to put on the mids.