8 ohm car subwoofer

[roleydre]

what kind of amp would i need to run an 8ohm woofer in a car,i read that you cant run it at 4 ohm.and i cant find an amp that puts out 8 ohms ...im just wondering...

 

[gtpsuper24]

Ask your question here DIYMA Car Audio Forum You get much better answers from the guys on that forum, very knowledgable when it comes to anything car audio.

Audioholics is not car audio, most everyone on here is hometheater/home audio video.

 

[ousooner2]

What sub is it?

I know more than I care to say about car audio lol

 

[roleydre]

Rfp-3812 ,rockford fosgate punch he,2"vc,400 max,200 rms,8ohm...

I bought these,and they were used i didnt even kno they made an 8ohm punch he...

I got 2 new ones but they are 4ohm,these are the ones i m going to put in my car...

But i sold the 8ohm ones to my buddy,i was trying to help him figure out how to hook them up in his car,thanks very much for your reply...

 

[slipperybidness]

If amp is 4 ohm stable, then 8ohms should not be a problem (or 16). 2 8ohm loads Wired in series = 16ohm load. Wired in parallel = 4 ohm load.

 

[GlocksRock]

Whatever an amp puts out at 4 ohm, will be half of that at 8 ohms, so he could just get a powerful 4 ohm amp and run just that one sub, but the better option is to either sell it and get a lower impedance sub, or get another 8 ohm version of the same sub.

 

[ImcLoud]

Parallel them babies, that will get you 4 ohms and let you take advantage of the amplifiers 4 ohm output...

 

[roleydre]

ok thanks and he does have 2 of them ,do i need a 1 or 2 channel amp,and do i need to wire the 2 subs together, then wire it to amp?or how does that work...

 

[ImcLoud]

get a bridgeable 2 channel or a mono block, either way...

 

[roleydre]

ok good ,i was just looking at some diagrams ,and i got the jist of it,thanks alot guys,im gonna help him hook the 8ohm speakers in his car , and wire them parallel...


and i got all the stuuf to hook my car stereo back up,well itll all be here monday or tuesday.

but i am hooking up the 4 ohm punch hes,and i have 2 of them ,and from the diagrams that i was looking at it looks like i need to wire them parallel, both positives from speakers to positve on amp,and both negative from speakers to negative on amp,that should give me 2 ohms to each speaker.

 

[slipperybidness]

ok good ,i was just looking at some diagrams ,and i got the jist of it,thanks alot guys,im gonna help him hook the 8ohm speakers in his car , and wire them parallel...


and i got all the stuuf to hook my car stereo back up,well itll all be here monday or tuesday.

but i am hooking up the 4 ohm punch hes,and i have 2 of them ,and from the diagrams that i was looking at it looks like i need to wire them parallel, both positives from speakers to positve on amp,and both negative from speakers to negative on amp,that should give me 2 ohms to each speaker.

Not exactly "2ohms to each speaker" but rather "the speakers will present a 2ohm load to the amp". Next question, the amp you will use is rated down to 2ohms? If not, then you may want to wire the subs in series and present the amp a 16ohm load.

 

[slipperybidness]

Not exactly "2ohms to each speaker" but rather "the speakers will present a 2ohm load to the amp". Next question, the amp you will use is rated down to 2ohms? If not, then you may want to wire the subs in series and present the amp a 16ohm load.

Fuzzy math strikes again. 2x speakers at 4ohm in series = 8 ohms. Doh, I was doing the math for 8ohms in series.

 

[ImcLoud]

Just get a 2 ohm stble amp if you want to run the dual 4 ohm speakers...

Car amps are cheap now, figure your needed wattage, and look on ebay, hifonics, R.fosgate, ect...

 

[GranteedEV]

what kind of amp would i need to run an 8ohm woofer in a car,i read that you cant run it at 4 ohm.and i cant find an amp that puts out 8 ohms ...im just wondering...

Any amp will work.

 

[roleydre]

yea i got a kenwood mono(says its can run 500 watts @2ohms) amp to run my 2 ( 4ohm subs)subs,my buddy hasnt got one yet(for his 8 ohm subs)...thanks alot guys,and i got a dude thats pretty car audio savy,its just hard to get him to answer my questions,but you guys are awesome ,thanks again...