2 18's in a RANGER!!!

[casper97ta 10+ year member]

i always thought it needed a bit more port area for 2 18's. Good score none the less. He should be able to hit a 50 no problem with that setup.

 

[bunkerking09 10+ year member]

However, I do think we might be adding 2 more 6" aero ports, but I'll have to see what his budget looks like.

i don't think they cost that much

 

[bigbud747 10+ year member]

Yeah, that's what we thought. However, we got the amps clamped so see what the impedence was coming from the amps, and it was about 4.8 ohms of power (930 watts) going to each sub. I emailed Nick at Fi, and he suggested that more port area would probably be good, but it would be pretty hard to lower impedence unless you had a personal termlab and unlimited time on your hands to jack with the box.

 

[bunkerking09 10+ year member]

only 930 watts?

wow, underpowered by far

 

[Skip01 5,000+ posts]

hahahaha 147@44hz

I just did 149@44hz with 2 12 Rs.....mannn....something is seriously wrong

 

[grassroots 10+ year member]

Yeah, that's what we thought. However, we got the amps clamped so see what the impedence was coming from the amps, and it was about 4.8 ohms of power (930 watts) going to each sub. I emailed Nick at Fi, and he suggested that more port area would probably be good, but it would be pretty hard to lower impedence unless you had a personal termlab and unlimited time on your hands to jack with the box.

you need some real amplifiers...

 

[bigbud747 10+ year member]

you need some real amplifiers...

Sorry but amps have little to do with impedence rise. The box is the main factor, which tells me the box is a little too big. However, Nick at Fi said that he has gotten the highest numbers with the least amount of "real world" power. And I honestly don't care if you did a 149 with 2 type r's, because numbers are all box dependent. Hell, Alan Dante just did 181 with a single DD Z series 18. But then again, his whole car is lined with concrete. So, yeah.

 

[MTXman 10+ year member]

More port area, actually seal the box off to make it a wall.

You will gain 1-2 db at peak frequency if I had to estimate.

 

[Lil Poot 5,000+ posts]

i think i can shut you down with 1 18. i challenge you to a sound-off, sir. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

you need more power //content.invisioncic.com/y282845/emoticons/fyi.gif.9f1f679348da7204ce960cfc74bca8e0.gif the sweet spot with my bl 15's seemed to be right around 1800 rms a piece. i did have 2 q 15's in my explorer with a crossfire vr2000d running them, they were actually louder than when i swapped in the bl 15's into the same box. once i put an american bass vfl 200.1 on them at .5 ohm, they really came alive.

 

[bigbud747 10+ year member]

Well here's what I think, but I don't know if this would work. Since the subs are D1's, could I wire them to the amp for a .5 ohms load, but since the imp rise to so much, should it level off to about 1.5~2 ohms, and not hurt the amps? Because with the subs wired to 2 ohms, the amps are only putting out about 4.8 ohms of power.

 

[Lil Poot 5,000+ posts]

yeah you'll always have impedence rise, DCR is basically just a reference point. when an amp says it's 1 ohm stable, it's talking DCR, which is just what you read by checking the voice coils resistance with nothing hooked up to it. nominal impedence i think is another term for that. i wouldnt recommend dropping any amp under 1 ohm unless you know the amp will handle that, and you have plenty of current to feed it. i blew up my 200.1 because i didnt have the current for it, and i had 2 yellowtops and a 240a alternator with 1/0 gauge big 3. i was just bumping it too often, asking too much of it. amp used to get hot as shit.

with my kicker at 1 ohm, it barely heats up at all and is much easier on my electrical system. i'd be looking for something like an ia 40.1 if i were you. i hear the stetsom amps handle

 

[bigbud747 10+ year member]

But since the amps wouldn't actually see a .5 ohm load, would they be fine, considering with imp rise they would be putting out about 2 ohms worth of power?

And, he definately does not have enough money to buy different amps.

 

[Blove1991 10+ year member]

I think that just because of the rise doesn't mean the amps will always be around 2 ohms they're will be time periods where it drop down to .5ohm IIRC

Dont quote me //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[mazda6i07 10+ year member]

Good lord!! That's insane, How long did it take to complete that build? Those are some amazing subs. Great job! ( i wish i could do something like that) //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif//content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif :thumbsup:

 

[bigbud747 10+ year member]

Good lord!! That's insane, How long did it take to complete that build? Those are some amazing subs. Great job! ( i wish i could do something like that) //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif//content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif :thumbsup:

Well, it took 3 days to make the box, seal it, and carpet it. Then a day to lay out the wires and sound deaden everything. Then probably another couple of days to get everything in and hooked up. So a total of about 6 days fro everything. And a lot of people at the competition couldn't believe that I built the box, considering I'm only 17. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif