Tryin to follow the Gain Setting Tutorial...

[qtipextra 5,000+ posts]

My target wattage is 1200 W. thats 48.9897 volts (at 2 ohms)

So my question is, Hifonics at 2 ohms, and at different ohms its puts out different amouts of power. So would I need to have the 2 ohm load hooked up to get the right read out?

EDIT: Yep, my bad, 1 too many zeros.

Click to read more...

 

[UndercoverPunk 5,000+ posts]

My target wattage is 12000 W. thats 48.9897 volts (at 2 ohms)
So my question is, Hifonics at 2 ohms, and at different ohms its puts out different amouts of power. So would I need to have the 2 ohm load hooked up to get the right read out?

no, I think you ment 1200 watts, and the voltage stays the same no matter what ohm load.

48 volts and 2 ohms is 1200, while 48 volts into 1 ohm is more.

of course I could be totally wrong.

 

[MikeS 10+ year member]

I'm assuming you mean 1200watts. 12000 would be pretty nuts! You don't need a load because you're figuring the impedance and wattage into the equation. The voltage becomes the variable that you are measuring for.

Mike

 

[Acidburn 5,000+ posts]

no, I think you ment 1200 watts, and the voltage stays the same no matter what ohm load.
48 volts and 2 ohms is 1200, while 48 volts into 1 ohm is more.

of course I could be totally wrong.

you're correct

 

[Jibbercrap 10+ year member]

the power (wattage) equation for this purpose (the variables you have) is P = V^2 / R. Where P stands for power or the wattage your amp is putting out because power is the rate of using energy which is expressed as watts, V is your volts and R is your resistance. So ya the volts should remain the same no matter what your resistance or ohms are.

 

[qtipextra 5,000+ posts]

Yea, i ment 1200. Thanks for explaining it.

We all gotta have noob questions once in a while or we'd mever learn!

One more question: For some odd reason my multimeter will go to about 38 volts, then say overload. Yes, I have it on AC. So what do I do now.

 

[JoseMCeee 10+ year member]

the display says overload? Thats weird. Maybe switch it to a higher AC setting. Like 200 or sumthing. What volume are your settin ur gains at by the way?

 

[Jibbercrap 10+ year member]

Hmmm my multimeter never says "overload" itll display a "1" if the reading is too high for the current setting lol...just try bumping it up to a higher AC setting. and make sure your multimeter is rated for the higher AC voltages...or it wont work =P

 

[qtipextra 5,000+ posts]

the display says overload? Thats weird. Maybe switch it to a higher AC setting. Like 200 or sumthing.

Yea, the display says overload, and the multimeter will read up to 700 vac. And it works when I pug it into an outlet, it reads 120. I just dont know why it freaks up on my amp output.

What volume are your settin ur gains at by the way?

The max i would use it at, which is max (62/62). Would turning it down to the recommended 3/4 help?

 

[Acidburn 5,000+ posts]

The max i would use it at, which is max (62/62). Would turning it down to the recommended 3/4 help?

YES! dont turn your HU up all the way, HUs distort too ya know

im guessing you have a Pioneer, on mine, i dont turn it up past 42, seems to start distorting after that point

 

[qtipextra 5,000+ posts]

Well, just tried it again. This time with the HU at 45. And the Bass EQ +0 db, the remote bass bosster at +0 db. and with the gain all the way up, it only read 1.2 vac. WTF? Then I turned up the bass EQ to +18 db, and I can only get it to about 35 volts with gain all the way up. Then I turn my HU up to max and it only increases it a volt or so. Then I turn the the remote bass boost up and at the first click, about +2 db, & multimeter overloads.

 

[JoseMCeee 10+ year member]

Well, just tried it again. This time with the HU at 45. And the Bass EQ +0 db, the remote bass bosster at +0 db. and with the gain all the way up, it only read 1.2 vac. WTF? Then I turned up the bass EQ to +18 db, and I can only get it to about 35 volts with gain all the way up. Then I turn my HU up to max and it only increases it a volt or so. Then I turn the the remote bass boost up and at the first click, about +2 db, & multimeter overloads.

ur dmm is shat. Even my 6 dollar DMM doesnt do that. Sorry to go off on ur DMM but thats the only thing that i think could be wrong here.

 

[qtipextra 5,000+ posts]

Thats what I was thinking. But my dads work bought it for him, and you would think it would work a little better then that.

 

[JoseMCeee 10+ year member]

get one off of ebay.