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question on ohms
Posted: Sat Oct 09, 2004 8:05 am
by audiobass10
Can anyone tell me if you have 1 ohm subs and you wire them to an amplifier in parrallel..does that make a .5 ohm load????
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Posted: Sat Oct 09, 2004 8:10 am
by William from NOLA
Yes, if you have two subs with single coils.
Posted: Sat Oct 09, 2004 9:56 am
by Dustin from Huntsville
Single coil 1 ohm subs? Um... give us some more details about your setup so we can be sure what you are trying to ask. But Like William said, if you have two 1 ohm subs and you wire them to the amp in a parallel configuration, then yes the amp is getting a .5 ohm load.
Posted: Sat Oct 09, 2004 11:36 am
by audiobass10
They are dual voice coil subs. I apologize. So if i wire 2 1 ohm dual voice coil subs in parrallel, what load does that result in??? Thanks for replying
Posted: Sat Oct 09, 2004 11:56 am
by William from NOLA
each sub would be .5, then wired in parallel again to the amplifier would be .25
If you were to wire them all in series, you'd get 4 ohms.
If you wire each sub individually in series, then in parallel to the amplifier, you will get 1 ohm.
Posted: Sat Oct 09, 2004 12:06 pm
by audiobass10
Ok, well here's my situtation. I want to run these 2 12" soundstream tarantulas off of this MA audio mono amplifier
http://www.boostcaraudio.com/ProductDet ... de=HK401SX. The subs are 900 wrms each and the only way i can get 1800 wrms out of the MA audio amp is by wiring it to .5 ohms. Is there any way to do that?? Also i appreciate all of your help
Posted: Sat Oct 09, 2004 5:04 pm
by William from NOLA
1200 is enough for them. Speakers don't NEED their recommended RMS. RMS is thermal. So wire them for 1 ohm.
Posted: Sat Oct 09, 2004 6:21 pm
by GlassWolf
Your subs should perform at their peak in the proper enclosure with as little as about 500wRMS each.
The power handling is as noted above, only a thermal power handling rating depicting how much power the voice coils can handle in heat (measured in watts) before incurring damage.
This doesn't mean they need as much power to reach peak excursion.
Some subs may need their peak rated power to perform properly, but this is rare, and generally denotes one of two things:
1: a very efficient speaker with a very low power handling, or
2: a very inefficient speaker that wastes a lot of energy (see audiobahn)
Posted: Sat Oct 09, 2004 8:06 pm
by audiobass10
Thanks to everyone for the help. I think i'll go for the MA audio amp and wire it at 1 ohm. Any suggestions on what type of enclosure would be best suited for these subs?
Posted: Sun Oct 10, 2004 5:36 am
by GlassWolf
do you know the EBP for the drivers?
what type of vehicle?
what kinds of music do you prefer?
what is your goal? SPL? SQ?
that';; help us tell ya the ideal box.