Required Electrical for an AQ200d @ .5 ohms.

[hatedonmostly 5,000+ posts]

There's a sig-worthy ignorant post. Looks like I was right.

Put it in your sig then and tell everyone who runs their amps at 0.5 daily that they are doing it wrong.

Oh, I forgot. You're one of those guys who thinks you have to have a high output alternator to run any kind of system.

 

[ahole-ic]

Put it in your sig then and tell everyone who runs their amps at 0.5 daily that they are doing it wrong.
Oh, I forgot. You're one of those guys who thinks you have to have a high output alternator to run any kind of system.

I'm one of those guys that understands electronics, and who HAS and DOES put up solid numbers. I also don't blow my equipment up trying to do so. It seems that people who make the claims you make, might understand a portion of things, but not the entire picture. Once you can play 151 plus on music daily at ~40hz or below, db drag style you will probably understand. You still won't be man enough to admit you were wrong and ignorant, but at least you will know.

 

[MONSONwarrior Premium Member]

Back to the issue. eCrack, am I going to have to run a single AQ @ 2 ohms for a little while until I get the second one?

 

[ahole-ic]

Back to the issue. eCrack, am I going to have to run a single AQ @ 2 ohms for a little while until I get the second one?

HAVE to? No. You could run your gain considerably lower and get away with it. With that being said, you'll be much happier for now at 2 ohms. You won't have to worry about much. What people don't understand is this: when your resistance falls by half, the amount of current drawn if the voltage stays the same is doubled. The limiting factor here is how much current can safely be drawn through the output transistors. At 2200 watts at 1 ohm you're looking at 47 volts x 47 amps. So, I'd say at most 55 amps is the limit that the amplifier can draw for any amount of time and survive. Transistors have a tolerance, and it should be about 15%.

To get that same 2200 watts at .5 ohm, you're going to set your gain at 33 volts. This will cause a current draw of 66 amperes. That is WELL over tolerance and that is RMS. We know that the impedence can drop to 1/4 of what it is wired to nominal. That's .125 ohms. Let's do the math there. 16v x 132 amps. Yeah... the transistors won't last long like this.

It is very important to know also, that amplifiers we run today may be greater than 80% efficient at 4 ohms, but at 1 ohm they are around 70% efficient. When you drop them to .5 ohm, they are much less efficient. If your voltage drops at all, you are even less efficient still.

It's not a recipe for success.

Edit: If you want to know how to set your gain so the amp will survive at .5 ohms, set your gain at 23.5v. This will cause a current draw of 47 amps at .5 ohm and produce 1104.5w. Remember, current is the limiting factor on those transistors.

 

[MONSONwarrior Premium Member]

HAVE to? No. You could run your gain considerably lower and get away with it. With that being said, you'll be much happier for now at 2 ohms. You won't have to worry about much. What people don't understand is this: when your resistance falls by half, the amount of current drawn if the voltage stays the same is doubled. The limiting factor here is how much current can safely be drawn through the output transistors. At 2200 watts at 1 ohm you're looking at 47 volts x 47 amps. So, I'd say at most 55 amps is the limit that the amplifier can draw for any amount of time and survive. Transistors have a tolerance, and it should be about 15%. To get that same 2200 watts at .5 ohm, you're going to set your gain at 33 volts. This will cause a current draw of 66 amperes. That is WELL over tolerance and that is RMS. We know that the impedence can drop to 1/4 of what it is wired to nominal. That's .125 ohms. Let's do the math there. 16v x 132 amps. Yeah... the transistors won't last long like this.

It is very important to know also, that amplifiers we run today may be greater than 80% efficient at 4 ohms, but at 1 ohm they are around 70% efficient. When you drop them to .5 ohm, they are much less efficient. If your voltage drops at all, you are even less efficient still.

It's not a recipe for success.

Edit: If you want to know how to set your gain so the amp will survive at .5 ohms, set your gain at 23.5v. This will cause a current draw of 47 amps at .5 ohm and produce 1104.5w. Remember, current is the limiting factor on those transistors.

Okay, well then as far as my electrical to run the two strapped will I be okay with my Deka starter, 250a alt, and a 20ah stinger in the back? or will I need to put a 100ah deka in the back.

 

[09civic 5,000+ posts]

Loudrc, ecrack knows what he is talking about and knows far more then you...

 

[Ronny 10+ year member]

Informative post eCrack. Many members understand Ohm's Law, but fail to put it into practice and apply like you described above //content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif

OP, I'd go larger than a 20aH batt in the rear. Not that you are all that far from sufficient at the moment, but the more the better //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[MONSONwarrior Premium Member]

Informative post eCrack. Many members understand Ohm's Law, but fail to put it into practice and apply like you described above //content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif
OP, I'd go larger than a 20aH batt in the rear. Not that you are all that far from sufficient at the moment, but the more the better //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

one of the main things though is size. I can get 1-2 20ah Shuriken batts for 50 a piece shipped and they're only 3 inches deep. I'm switching up my set up to save some space from my current space hog.

 

[rangerboy101 10+ year member]

Hell, I am running my Maxxsonics made MB Quart amps at 0.5 ohm without a single problem.

X2. I run my MB Quart 2000d at .5 ohm with no problems. I've had mine running at .5 ohm for about 7 months now.

 

[hatedonmostly 5,000+ posts]

I'm one of those guys that understands electronics, and who HAS and DOES put up solid numbers. I also don't blow my equipment up trying to do so. It seems that people who make the claims you make, might understand a portion of things, but not the entire picture. Once you can play 151 plus on music daily at ~40hz or below, db drag style you will probably understand. You still won't be man enough to admit you were wrong and ignorant, but at least you will know.

LOL. Aren't you running DDZ subs and Z1 amps? How hard is it really to do 151 below 40 Hz with $3k in equipment? And that's $3k on just subs and amps. My goal was 150 on music, but realizing that I'll probably only be able to do that on a burp (single cabs don't like sealed on the dash scores), I've decided to reset my goal to around 148. I'm already at 145 with the setup in sig and running ~2k. Oh, and that's at about 28 Hz. Oh, and my entire substage only cost $600, instead of $3k.

In practice > in theory

 

[hatedonmostly 5,000+ posts]

I'm one of those guys that understands electronics, and who HAS and DOES put up solid numbers. I also don't blow my equipment up trying to do so. It seems that people who make the claims you make, might understand a portion of things, but not the entire picture. Once you can play 151 plus on music daily at ~40hz or below, db drag style you will probably understand. You still won't be man enough to admit you were wrong and ignorant, but at least you will know.

LOL. Aren't you running DDZ subs and Z1 amps? How hard is it really to do 151 below 40 Hz with $3k in equipment? And that's $3k on just subs and amps. My goal was 150 on music, but realizing that I'll probably only be able to do that on a burp (single cabs don't like sealed on the dash scores), I've decided to reset my goal to around 148. I'm already at 145 with the setup in sig and running ~2k. Oh, and that's at about 28 Hz. Oh, and my entire substage only cost $600, instead of $3k.

 

[MONSONwarrior Premium Member]

Bump.

 

[ahole-ic]

No I'm running less than 3kw. 151 on music is not easy no matter what equipment you're using. Also, don't pretend you have ANY clue what I paid for my equipment. Don't be jelly brah. You've been proved wrong now just stfu and learn something. I actually HAVE done it in practice. Maybe you making your theory a reality is why you can't hit 150. Just a thought......

Edit: and also this is not the first time I've done scores like this. It's just the first time I've done it with so little power. Get your facts straight pal.

 

[MONSONwarrior Premium Member]

one of the main things though is size. I can get 1-2 20ah Shuriken batts for 50 a piece shipped and they're only 3 inches deep. I'm switching up my set up to save some space from my current space hog.

I like when people answer my questions.. Will I be okay running the two strapped with my alt, front battery and 1-2 20ah shuriken batts?

 

[ahole-ic]

I like when people answer my questions.. Will I be okay running the two strapped with my alt, front battery and 1-2 20ah shuriken batts?

You COULD do the math. Those batts aren't going to help for long. I wouldn't waste my money on them honestly.