Dual 1 Ohm Sub on .5 ohms.

[MmatsDude 10+ year member]

^ab500.1 i believe. 5K+

dayum, whats your electrical?

 

[MmatsDude 10+ year member]

I correct myself' date=' after reading the specs on this amp if you wire it with 2 D2 subs up to your amp and get a .5 ohm load then your subs will actually only be getting 1350wrms a piece that is assuming you are running sufficient voltage to the amp and have the right size fuses in your amp to get the full 2700wrms.
In order to achieve 2700wrms at 13.8 volts like mmats site says, you would need to have at least a total of 275amps between the 2 fuses on your amp at 70% efficiency at full power according to mmats sight. But according to lightav.com their amps are over 90% efficient and if thats the case then you will only need a total of 225amps between the 2 fuses on your amp, and if your vehicle is running at 14.4v like most people try to achieve then it will actually put you above 2700wrms, just fyi in case you were unaware. Because if you run dual 100amp fuses like they recommend then you will not be able to run your amp at 2700wrms unless your voltage to your amp is at least 15v+ at 90% efficiency.[/quote']

Well I went to the 12volt.com and used there calculator, and It seems like Mmats is right on using dual 100 Amp fuses.

Check this out.

I calculated For Power(P)

P = E x I

On voltage I put in. 13.8 Volts

On current 200 Amps

The result was 2, 760 Wrms

Although I have no idea what im doing Lol, i could be totally wrong

somebody fill me in if im wrong

 

[ARSkemp 10+ year member]

How many watts?

my amp's rated @ 4700 @ 1ohm.

I have it running @ .5 ohm, set with a dmm to give 1200 watts to each sub (4 12" aqs in sig). I know i'm probably not getting newhere near that though after imp rise, voltage drop. I then set it by ear, but that didn't really change the gain position much.

dayum, whats your electrical?

my electrical is also in my sig, 1 kinetic 2400 up front, 2 PM d3100s in the back. Voltage drops to 12.9 full blast @ idle, which i am happy with.

you can click the link in my sig for my build log if u want more info, got some vids in there, you can see the voltage drop on my voltage gauge too in one of the vids

 

[MmatsDude 10+ year member]

my amp's rated @ 4700 @ 1ohm.
I have it running @ .5 ohm, set with a dmm to give 1200 watts to each sub (4 12" aqs in sig). I know i'm probably not getting newhere near that though after imp rise, voltage drop. I then set it by ear, but that didn't really change the gain position much.

my electrical is also in my sig, 1 kinetic 2400 up front, 2 PM d3100s in the back. Voltage drops to 12.9 full blast @ idle, which i am happy with.

you can click the link in my sig for my build log if u want more info, got some vids in there, you can see the voltage drop on my voltage gauge too in one of the vids

Will check it out.

Did you upgrade your alt?

 

[thorshammer1 10+ year member]

dayum, whats your electrical?

my electrical consists of 220amp alt, Optima Yellow, Kinetik 2400, 2 runs 0 but I don't think you were asking bout mine. LOL Soon to be 2 2400's and 4-6 runs of 0.//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

 

[ARSkemp 10+ year member]

Will check it out.
Did you upgrade your alt?

nope, using the stock alt (110 amps). I was kind of worried that my voltage drop would be worse before i put everything in, but so far i haven't had any problems.

 

[MmatsDude 10+ year member]

my electrical consists of 220amp alt, Optima Yellow, Kinetik 2400, 2 runs 0 but I don't think you were asking bout mine. LOL Soon to be 2 2400's and 4-6 runs of 0.//content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

Thats a nice electrical, i have a 180 amp EA alt soon to change it to a 250 amp mechman alt and getting another pm d3100 on the trunk, idk if i should change my hc1800 under the hood for a pm d2700, i think it'll hang in there just fine, i also have to double up my runs of 1/0:veryhapp:

 

[MmatsDude 10+ year member]

nope, using the stock alt (110 amps). I was kind of worried that my voltage drop would be worse before i put everything in, but so far i haven't had any problems.

Dayum, that alt is tough. //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

 

[ARSkemp 10+ year member]

Dayum, that alt is tough. //content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif

When the batteries are trickle charged overnight, they rest @ ~ 13.3 volts, so i'm pretty sure that helps keep the voltage up. Most of the time i'm not playing full blast though, maybe 1/2 to 3/4 volume, and the voltage drop is very miniscule @ that point (.2-.4), so i figure i'll be able to get by w/ my current alt.

 

[MmatsDude 10+ year member]

When the batteries are trickle charged overnight, they rest @ ~ 13.3 volts, so i'm pretty sure that helps keep the voltage up. Most of the time i'm not playing full blast though, maybe 1/2 to 3/4 volume, and the voltage drop is very miniscule @ that point (.2-.4), so i figure i'll be able to get by w/ my current alt.

trickle charging the batts will definately help the alt, i thought your alt was taking a beating wich causes them to fail in time:crap: glad everything turned out fine.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[ARSkemp 10+ year member]

trickle charging the batts will definately help the alt, i thought your alt was taking a beating wich causes them to fail in time:crap: glad everything turned out fine.//content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

there not charged every night, but i try to do it when i can //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Nobody's Louder 10+ year member]

Yes, I know Ill need to get the subs dual 2's to run them both @ .5 ohms with only 1 d3500.05
What I am plannin to do. Is get another d3500.05, if I do Ill need to get both subs dual 1, to connect each sub on 1 amp and wire down each dual 1 ohm sub to .5 ohms, wich would be fine right?

Well in that case if you are gonna be running 2 of those amps then yes you are fine. I thought you meant you were gonna be using 1 amp to power both of them, might of misread it.

 

[Nobody's Louder 10+ year member]

Well I went to the 12volt.com and used there calculator, and It seems like Mmats is right on using dual 100 Amp fuses.
Check this out.

I calculated For Power(P)

P = E x I

On voltage I put in. 13.8 Volts

On current 200 Amps

The result was 2, 760 Wrms

Although I have no idea what im doing Lol, i could be totally wrong

somebody fill me in if im wrong

That id correct for the most part, but you are missing one part of the equation, after you get the total amount of wrms, then you are to multiply it by the efficiency in which according to mmats the efficiency is 70% on those amps, which if that is the case then, you are actually only able to get 1932wrms at full power with 2 100amp fuses at 13.8 volts.

This is how the equation goes,

200a X 13.8v = 2760wrms X .70 Efficiency = 1932wrms total

to get 270wrms

275a X 13.8v = 3795wrms X .70 Efficiency = 2656.2wrms which is relatively close