wiring configuration

[chrisw91 10+ year member]

i have a memphis pr-1000 mono amp, and not sure if i should get 3 or 4 RE8 subs.

amp does 600@ 2 ohms. so if i was to get 3 i could wire them to 2.67. how do i figure out how much my amp will put out at that ohm load? and if i got 4 i could wire them to a 2 ohm load. so, what would be better? either way i will have the gain just about maxed out im thinking just to give the subs rms. is it good to do that? and just your overall opinion. this is a daily driver so it needs to last. thanks

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[dman4486 5,000+ posts]

I always like to have a little overhead power....I believe it is easier on the amp.

 

[chrisw91 10+ year member]

so neither of them would be too good?

 

[alvitae 10+ year member]

Cranking the gain up will just shorten the amp and subs life. It's for matching the amp to the h/u's output voltage. I've also found when you crank you the gains all it does is max every thing out to at 1/4 or whatever volume so you clip and distort a lot.

 

[chrisw91 10+ year member]

so would it be better to have more subs just not all the power, or less subs getting what they can handle?

 

[alvitae 10+ year member]

An easy way is figure out what subs you want to run and at what ohm, Add up the total watts rms and get an amp with that rms or a little more. Then if it's 1000ish watts you'll be ok with a strong stock electrical. If it's more than that start upgrading. Do the big 3, Alternator and go to kinetik's website and use the calculator to see what battery or battery's you need.

 

[chrisw91 10+ year member]

i might just have to go with 2. idk cause im trying to build this around the amp, i dont have money to get another one. and, do they call it big 3 cause there are 3 batteries? dont know much about it other than you connect multiple batteries together

 

[alvitae 10+ year member]

No, the big 3 is upgrading your power wire from alternator to battery, running another ground etc. here is a link to it http://www.caraudio.com/forum/showthread.php?t=152355

But since you are running 600 watts at 2 oms I wouldn't worry about it till you have extra money and time. It doesn't cost that much to do though and helps the electrical system out for every thing not just stereos.

 

[chrisw91 10+ year member]

oh, so doesnt even involve getting another battery?