I'm done running a .5ohm load

[groundpound4200 5,000+ posts]

If you say so... I just think OP's logic is flawed. I agree that amps are more efficient at higher impedance. So you might use a couple watts less, at 2500 watts though this is a small percentage and I don't foresee it solving the underlying problem of insufficient electrical.

 

[Falcons 5,000+ posts]

just like how an install bay 4 guage wiring kit and a knukonceptz 4 guage wiring kit may have the same size cable because of the jacket, but under that jacket you find so much more wire in the knu, so just because they are both 4 guage doesnt make them both them same. same koncept with amplifier. useewatididthere?

 

[LosIsATool 5,000+ posts]

the way I understand it is

Amp 1: 80% at 2ohms

Amp 2: 60% at .5ohms

Amp 1 will take less current to make its rated power then amp 2. There for less voltage drop.

 

[dbeez 5,000+ posts]

the way I understand it isAmp 1: 80% at 2ohms

Amp 2: 60% at .5ohms

Amp 1 will take less current to make its rated power then amp 2. There for less voltage drop.

true but i think you haveunderlying (spelling) electrical problem and doing this is just semi covering it up. bad grounds or bad batt maybe even an issue with alt.

 

[groundpound4200 5,000+ posts]

the way I understand it isAmp 1: 80% at 2ohms

Amp 2: 60% at .5ohms

Amp 1 will take less current to make its rated power then amp 2. There for less voltage drop.

I agree there will be less voltage drop but how do you know you are gaining 20% efficiency. That's where I am having a hang up... I think realistic differences in efficiency gains will be less than 10%

 

[LosIsATool 5,000+ posts]

You think going from .5 to 2 will only be 10%?

 

[groundpound4200 5,000+ posts]

Probably... plus without knowing your rise and such you may have been seeing 2 ohms already when your last amp was wired at .5 (4X rise is not uncommon) There aren't many people with DC clamps out there who test for efficiency. I'm not trying to be a dick btw. I hope it does work better for you, I just don't want you to get your hopes up.

 

[pimpnyou204 10+ year member]

Maybe its just me but aren't those kicker amps 2 aMps strapped in 1 so in reality your looking at running 2 amps at 1 ohm but when you wire the coils your gettin a 2 ohm load... 1 ohm is still better but not like a world of a difference u will gain efficiency true. But from what I've seen in changing amps bigger smaller etc. Their gonna draw as much as they can.

Like.. You get voltage drops when amps aren't being pulled in the correct amount buy I dont think that crescendo is actually pulling what it's supposed to at .5 ohms bcuz your choking it. Now granted the kicker might do better and give more rms but I think your your drop will be about the same bcuz it's gonna want more power.

So yea better choice more power etc but like said before it's a cover up for what's wrong. Maybe bad ground run another negative this time to battery.. Maybe another positive run would help.

 

[Imtjnotu 5,000+ posts]

I had mt orion 2500d at .5 clamped doing 2900@13.5 and that was prett much full tilt

 

[LosIsATool 5,000+ posts]

I know the BC2K would get smoking hot also, so I might of been choking it.

 

[Kangaroux 5,000+ posts]

groundpound, each and every amp is not 100% efficient. With a drop in impedance, you lower resistance and also the efficiency of the amplifier. For example, if the amp is say 80% efficient @ 4 ohms and is 50% efficient @ .5 ohms then you have a drastic change in current draw. With the amp set to put out 1000 @ 4, you would need to be pulling 1250w to achieve that 1,000 (technically speaking). To run that same amp @ .5 ohms and pulling 1,000, your actual current draw is 2,000w (again, technically speaking).

 

[CRXBMPN 5,000+ posts]

i had this big thing typed up, and then I thought one thing... do a batt voltage and speaker voltage test on each amp under similar loads, and come back and tell us what happens.... aside from having a "CEA RATED" more powerful amp out of the box for the impedence you want I'm not sure you will see or hear these big gains. If you really want to get tricky, put the 2500 @ .5 ohm and see if box rise gets you where you want to be at 2 ohm final load :-D

 

[Kangaroux 5,000+ posts]

i had this big thing typed up, and then I thought one thing... do a batt voltage and speaker voltage test on each amp under similar loads, and come back and tell us what happens.... aside from having a "CEA RATED" more powerful amp out of the box for the impedence you want I'm not sure you will see or hear these big gains. If you really want to get tricky, put the 2500 @ .5 ohm and see if box rise gets you where you want to be at 2 ohm final load :-D

Good idea, though I think you need to do a clamp test to actually calculate the rise

 

[LosIsATool 5,000+ posts]

I would play around with it but I smoked the BC2K this morning. Thats where this rant came from

 

[Imtjnotu 5,000+ posts]

i had this big thing typed up, and then I thought one thing... do a batt voltage and speaker voltage test on each amp under similar loads, and come back and tell us what happens.... aside from having a "CEA RATED" more powerful amp out of the box for the impedence you want I'm not sure you will see or hear these big gains. If you really want to get tricky, put the 2500 @ .5 ohm and see if box rise gets you where you want to be at 2 ohm final load :-D

set it to ohms while it was playing and read the meter at the speaker terminals and it never went about .7-.8