Hfonics brutus 1200.1 dmm math?

[blimpthepimp 10+ year member]

Im really rusty in the car audio game. What hz do i play? What number should i get on the dmm?

Rusty , I play mid/highs to max to ware the wont distort ,then unplug the speaker wires to the amp,add 50hz test tone cd? add dmm to + and - and turn the gain up until i get what number?

hu eq on flat?

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[brooklynjoy2008 10+ year member]

How many watts? And at what impedance

 

[ssteele18 10+ year member]

How many watts? And at what impedance

this.

for example, 1000rms x 1 ohm = 1000

sqrt(1000) = 31.6...

Multiply RMS by Impedence, find square root of the product.

 

[blimpthepimp 10+ year member]

Brz1200.1 2 sundown e 12's l ported box 36hz wire at 1 ohm

 

---------- Post added at 09:58 PM ---------- Previous post was at 09:58 PM ----------

 

sundown d4

 

[blimpthepimp 10+ year member]

How many watts? And at what impedance

was everythinng i said corret? sorry for typo mistakes ,just got a smart phone and im at work

 

[blimpthepimp 10+ year member]

this.
for example, 1000rms x 1 ohm = 1000

sqrt(1000) = 31.6...

Multiply RMS by Impedence, find square root of the product.

Im pushing 2 sundown e 12's , 400watts rms ,what formula do I use?

 

[brooklynjoy2008 10+ year member]

If I were you I would not set that amp for 1200 watts. You are going over rated and if you set that amp to 1200 watts you will be clipping, and could fry those subs. I would set it at 1000. Steele did the math for u already too.

 

[DaveVT 10+ year member]

50hz 0db test tone. set sub level all the way on deck, turn off all bass boost on deck and amp. Turn deck up as high as you will listen to it and play the test tone.

Use dmm and raise gain til you reach 30v AC or as close as you can get without going over. You can do this without the sub connected or with its up to you.

formula would be rms total (900)x1(ohm)=900 and get the square root of 900 which is 30.

test tones can be gotten here. Burn multiple tracks with no gap between tracks.

http://www.realmofexcursion.com/audio/50hz.mp3

 

[brooklynjoy2008 10+ year member]

Steele gave you the formula. Its the square root of Watts x impedance.

 

[blimpthepimp 10+ year member]

sub lvl? my deck has sub nom and rev , im guessing sub nornmal and +6 witch is max.....I fryed 2 memphis prs since i got this amp //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

 

[brooklynjoy2008 10+ year member]

I think that is for polarity. You may have an option to control the sub level. If u do turn it all the way up. And u most likely were clipping those Memphis subs. I would not go any higher than 32 volts, the difference will be very small.

 

[zako 10+ year member]

Steele gave you the formula. Its the square root of Watts x impedance.

I thought the formula used resistance instead of impedance. Does this matter? Resistance is usually close to nominal impedance, but not always so.

 

[blimpthepimp 10+ year member]

Does sla matter when tuneing?

 

[ssteele18 10+ year member]

I thought the formula used resistance instead of impedance. Does this matter? Resistance is usually close to nominal impedance, but not always so.

The formula is only to get a baseline anyways. When you're set at 1000 at 1ohm, you're rarely going to see the full 1000. This is the thing about using a dmm. You're basically setting your max, bc with box rise and everything accounted for, you won't be near 1ohm often anyways. But when you get to the point where you're trying to decide whether it's a big difference between resistance vs impedance, you should already know the answer and would be using an o-scope anyway.

 

---------- Post added at 06:51 PM ---------- Previous post was at 06:50 PM ----------

 

Btw, I had 2 E-15's on 1000 and rarely even got warm.

 

[quackhead 10+ year member]