how many amps do i need.

[LoudBimmer]

I'm replacing stock speakers in 2001 BMW 325i with Alpine SPS-600c.

In front doors it got 6.5, 2.5 and tweets

in back doors just 2.5

in the back 6.5

I got stock bmw amplifier which i believe put's out 40w x 4 at 2 ohm. My SPS are 4 ohm. I'm looking at Rockford Fosgate PBR300X4 which puts out 75w x 4 at 4 ohm. Do i need another amp for 2.5 and tweets? (i will replace stock tweets with alpine one's).

[jcshort]

I'm replacing stock speakers in 2001 BMW 325i with Alpine SPS-600c.

In front doors it got 6.5, 2.5 and tweets

in back doors just 2.5

in the back 6.5

I got stock bmw amplifier which i believe put's out 40w x 4 at 2 ohm. My SPS are 4 ohm. I'm looking at Rockford Fosgate PBR300X4 which puts out 75w x 4 at 4 ohm. Do i need another amp for 2.5 and tweets? (i will replace stock tweets with alpine one's).

you should only need one i think the factory tweet have a cap that blocks the bass but its been a while sence ive worked on a bimmer just check the ohms first before u hook it up to make sure there 4 ohms

[LoudBimmer]

I'm replacing stock speakers in 2001 BMW 325i with Alpine SPS-600c.

In front doors it got 6.5, 2.5 and tweets

in back doors just 2.5

in the back 6.5

I got stock bmw amplifier which i believe put's out 40w x 4 at 2 ohm. My SPS are 4 ohm. I'm looking at Rockford Fosgate PBR300X4 which puts out 75w x 4 at 4 ohm. Do i need another amp for 2.5 and tweets? (i will replace stock tweets with alpine one's).

you should only need one i think the factory tweet have a cap that blocks the bass but its been a while sence ive worked on a bimmer just check the ohms first before u hook it up to make sure there 4 ohms

I'm replacing stock tweets, and keeping 2.5 mid's. So RF amp will be enough?