enough power for a 4channel
Thread Starter
On The Tree
Joined: Mar 2006
Posts: 183
Likes: 0
From: cullman,AL
enough power for a 4channel i got 2 sets of alpine SPS171A component speakers 50 watts RMS is the alpine MRPF250 4 channel amp 40watts rms per channel gonna be enough power to feed these speakers or should i upgrade to the MRPF450 amplifier for $100 more. I'm sticking with all alpine equipement.
Originally Posted by evrae205
i got 2 sets of alpine SPS171A component speakers 50 watts RMS is the alpine MRPF250 4 channel amp 40watts rms per channel gonna be enough power to feed these speakers or should i upgrade to the MRPF450 amplifier for $100 more. I'm sticking with all alpine equipement.
If you take a look at the details of both amps the 450 has better power, but it's most noticeable for 2 ohm loading.
If you are stuck on using 171A's then those are 4 ohm drivers - and the difference between the 250 and 450 will be 30 watts rms. This is a small enough difference that it will not be worth spending 50% more on the amp - unless you are not running a sub and need those drivers for bass. However if you have no sub it might make sense.
If you could get 2 ohm speakers (like the popular infinities or whatever) then the 450 has the capability to deliver 100 watts rms into 2 ohm loading. In this case - the 450 would offer a very significant advantage, and begins to make sense.
If you have a sub - stick with the smaller amp and put extra money in your pocket. I also don't think you need components in the back - but that is up to you. I think you could use 171 coaxials and still be voice matched, while saving $100.
If you don't have a sub - then upping the power. Again you could get coaxials for the back and end up at the same total.
The 171's can sound good, but need a sub. Apline components are tailored more towards mid-bass and probably isn't the best choice in a 6.5" system with no sub.
If you are stuck on using 171A's then those are 4 ohm drivers - and the difference between the 250 and 450 will be 30 watts rms. This is a small enough difference that it will not be worth spending 50% more on the amp - unless you are not running a sub and need those drivers for bass. However if you have no sub it might make sense.
If you could get 2 ohm speakers (like the popular infinities or whatever) then the 450 has the capability to deliver 100 watts rms into 2 ohm loading. In this case - the 450 would offer a very significant advantage, and begins to make sense.
If you have a sub - stick with the smaller amp and put extra money in your pocket. I also don't think you need components in the back - but that is up to you. I think you could use 171 coaxials and still be voice matched, while saving $100.
If you don't have a sub - then upping the power. Again you could get coaxials for the back and end up at the same total.
The 171's can sound good, but need a sub. Apline components are tailored more towards mid-bass and probably isn't the best choice in a 6.5" system with no sub.
Last edited by todddchi; May 26, 2006 at 12:07 PM.
Originally Posted by todddchi
If you take a look at the details of both amps the 450 has better power, but it's most noticeable for 2 ohm loading.
If you are stuck on using 171A's then those are 4 ohm drivers - and the difference between the 250 and 450 will be 30 watts rms. This is a small enough difference that it will not be worth spending 50% more on the amp - unless you are not running a sub and need those drivers for bass. However if you have no sub it might make sense.
If you could get 2 ohm speakers (like the popular infinities or whatever) then the 450 has the capability to deliver 100 watts rms into 2 ohm loading. In this case - the 450 would offer a very significant advantage, and begins to make sense.
If you have a sub - stick with the smaller amp and put extra money in your pocket. I also don't think you need components in the back - but that is up to you. I think you could use 171 coaxials and still be voice matched, while saving $100.
If you don't have a sub - then upping the power. Again you could get coaxials for the back and end up at the same total.
The 171's can sound good, but need a sub. Apline components are tailored more towards mid-bass and probably isn't the best choice in a 6.5" system with no sub.
If you are stuck on using 171A's then those are 4 ohm drivers - and the difference between the 250 and 450 will be 30 watts rms. This is a small enough difference that it will not be worth spending 50% more on the amp - unless you are not running a sub and need those drivers for bass. However if you have no sub it might make sense.
If you could get 2 ohm speakers (like the popular infinities or whatever) then the 450 has the capability to deliver 100 watts rms into 2 ohm loading. In this case - the 450 would offer a very significant advantage, and begins to make sense.
If you have a sub - stick with the smaller amp and put extra money in your pocket. I also don't think you need components in the back - but that is up to you. I think you could use 171 coaxials and still be voice matched, while saving $100.
If you don't have a sub - then upping the power. Again you could get coaxials for the back and end up at the same total.
The 171's can sound good, but need a sub. Apline components are tailored more towards mid-bass and probably isn't the best choice in a 6.5" system with no sub.
Thread Starter
On The Tree
Joined: Mar 2006
Posts: 183
Likes: 0
From: cullman,AL
I think ill got with the MRP250 so ill have that $100 for something more important.
I got one alpine 10in sub in the back in a mtx thunderform box so thats plenty of bass for me. I'm not looking to make the nieghbors up with music the exhaust will do that job just fine
I just want it to sound good to my passengers and me.
THX for all the input guys.
I got one alpine 10in sub in the back in a mtx thunderform box so thats plenty of bass for me. I'm not looking to make the nieghbors up with music the exhaust will do that job just fine
I just want it to sound good to my passengers and me. THX for all the input guys.
