Car Audio Central - Ultimate Car Audio Forum and Community

by **GlassWolf** » Sun Oct 10, 2004 7:48 am

Efficiency Bandwidth Product (EBP)
EBP = Fs / Qes
50 or less = best used in a sealed enclosure.
50 - 90 = flexible enclosure options.
90 or greater = best used in ported enclosure.

SQ = Sound Quality
SPL = sound pressure level SPL events compete for the loudest system)

for a Cherokee and rap, I'd suggest going with either ported or bandpass (4th order)
Go with ported for better sound quality and more diversity if you listen to other music too.
Bandpass will be a bit louder, but narrower in response, and not as deep.

by **audiobass10** » Sun Oct 10, 2004 6:16 am

No I don't know the EBP or what it means.
I have a 1993 Jeep Cherokee.
I prefer rap
As for my goal..What does spl mean..I'm pretty sure SQ is sound quality?

Thanks for all your help so far

by **GlassWolf** » Sun Oct 10, 2004 5:36 am

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.

by **audiobass10** » Sat Oct 09, 2004 8:06 pm

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?

by **GlassWolf** » Sat Oct 09, 2004 6:21 pm

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)

by **William from NOLA** » Sat Oct 09, 2004 5:04 pm

1200 is enough for them. Speakers don't NEED their recommended RMS. RMS is thermal. So wire them for 1 ohm.

by **audiobass10** » Sat Oct 09, 2004 12:06 pm

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

by **William from NOLA** » Sat Oct 09, 2004 11:56 am

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.

by **audiobass10** » Sat Oct 09, 2004 11:36 am

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

by **Dustin from Huntsville** » Sat Oct 09, 2004 9:56 am

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.

Car Audio Central - Ultimate Car Audio Forum and Community

question on ohms

Post a reply

Expand view Topic review: question on ohms