



12202011, 09:24 AM


Ford Ranger Driver


Join Date: Dec 2009
Posts: 2,571


Re: Show Your System
Quote:
Originally Posted by GLH
No. 1000 watts is the power. The ohms is just the resistance to the power, it's still drawing 1000 watts if there is enough current from the charging system. 1000 watts is 1000 watts.

what is the make and model, I will tell you exactly what it will do

No shit "1,000w is a 1,000w" but you need a stronger electrical system to pull 1kw at 1 ohm verse 1kw at 2 ohm.

Quote:
Originally Posted by pooleo
fwiw, a 1000w amp with a 1 ohm load will push/draw 1000w of power to the subs. That same 1000w with a 2ohm load will only push/draw 500w of power to the subs. If you have 1ooow amp and a .5ohm load, it will try to push/draw 1500w and fry the amp

No... It all depends on how the amp is manufactured. For example, Audiopipe 3000 puts out 3k at 2 ohm and something like 2k at 1 ohm. So obviously your theory doesn't work here.
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Last edited by ranger101; 12202011 at 12:08 PM.




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12202011, 10:30 AM


Just call me Neo.


Join Date: Jul 2011
Posts: 2,406


My 600w at 1 ohm is pushing out 600...
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12202011, 03:07 PM


dumpster fire


Join Date: Sep 2010
Posts: 5,371


Re: Show Your System
installed the new headunit today. still need to install the DD door speakers I bought 4 months ago lol
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2016 Ford Expedition XLT Ecoboost 4x4
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12222011, 02:35 AM

Ford Ranger Driver


Join Date: Oct 2011
Posts: 8,818


Re: Show Your System
The charging system of your vehicle does not care what impedance load your speakers/subwoofers are. It is trying to supply enough current to make whatever wattage your amp(s) are pushing to that load. If your amp is pushing 1000 watts to a 1 ohm load or 1000 watts to a 2 ohm load, it is still 1000 watts for the charging system of your vehicle to supply enough current to. That is as simple an explanation there is.

12242011, 09:24 AM

Ford Pickup


Join Date: Dec 2011
Posts: 108


Re: Show Your System
Glad to see some nice stuff in here
Heres mine:
consists of:
2 SA12s
sundown saz 1500dv1
sundown sax 125.2 bridged at @ 2ohms
Stinger spv70 in the back
3 coats of EdeadV3 everywhere
2 sets of Audiopipe Components (surprisingly nice speakers)
Custom doors and pillars
only got it metered once with crap voltage 144.7 at 33 at headrest (MECA)

Now heres what i got to play with after Xmas:
2 SA8s (thinking about gettin 2 more, and running 4 and dropping my amp to .5)
2 DD 1508s (powdercoated blue baskets, fresh recones)
also have a SKAR vvx12 sitting here, as well as a Inciminator Audio King Of Bass Motor.




12242011, 09:33 AM


Ban Survivor. (x2)


Join Date: Jun 2010
Posts: 6,764


Re: Show Your System
Quote:
Originally Posted by ranger101
No... It all depends on how the amp is manufactured. For example, Audiopipe 3000 puts out 3k at 2 ohm and something like 2k at 1 ohm. So obviously your theory doesn't work here.

Not theory, fact.
Quote:
The calculation for figuring out how much is fairly straightforward, and pretty much what I would expect it to be. Since ohms measure resistance, the more ohms, the less output from the amplifier. Conversely, the less ohms, the more output from the amplifier.
Since the amp is rated at a specific amount of ohms (i.e. 100 watts @ 4 ohms), a different amount of ohms will produce a different output. Two 8 ohms speakers wire in series (16 ohms total) would cause the amp to produce 25 watts to each speaker.Amplifier Output = Amplifier Watts x (Amplifier Rated at Ohms / Speaker Chain Ohms)
Amplifier Output = 100 watts x (4 ohms / 16 ohms)
Amplifier Output = 100 watts x 1/4
Amplifier Output = 25 watts
The amp produces 100 watts at 4 ohms. When the resistance is increased to 16 ohms, four times what it was rated, the amplifier produces one fourth as many watts.


To simplify, 1ohm = 100% of rated power. 2ohm = 50% of rated power. 3ohm = 33%. 4ohm = 25% and so on
(where ohm represents speaker load on amp)

However, a 1ohm load on a NON 1ohm stable amp will burn it up. For instance, a 600w amp rated at 2ohms will attempt to put out 1200w at 1ohm. Thus, frying the amp.
Last edited by pooleo; 12242011 at 09:36 AM.




12242011, 09:56 AM


Ban Survivor. (x2)


Join Date: Jun 2010
Posts: 6,764


Re: Show Your System
Here is the formula: Amplifier Output = Amplifier Watts x (Amplifier Rated at Ohms / Speaker Chain Ohms)
So, 1000w amp rated at 1ohm with a 1ohm load.
Amplifier Output = 1000w x (1ohm / 1ohm load)
Amplifier Output = 1000w x (1)
Amplifier Output = 1000w
Lets try 1000w amp rated at 1ohm with a 2ohm load.
Amp Out = 1000w x (1ohm / 2ohm load)
1000w x .5
Amp out = 500 watts with a 2ohm speaker load.

12252011, 05:58 PM


Forget about the toe.


Join Date: Mar 2010
Posts: 463


Re: Show Your System
the problem with your theory is that not all amps are rated at 1 ohm, nor did you specifiy this is what you were referring to. your math is right, but most mainstream amps are rated at 2 or 4 ohms.
i think your latest example is best, but your original statement was a little too vague to make sense.
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12252011, 08:29 PM

Ford Pickup


Join Date: Dec 2011
Posts: 108


Re: Show Your System
so explain how amps rated at 1 ohm can run at .5.....for instance my saz1500d rated at 1500 @1ohm but can be ran at .5. ive even seen a pair strapped at .5ohms (each amp at .25ohms and that was on a 16v setup.




12252011, 08:37 PM


Ban Survivor. (x2)


Join Date: Jun 2010
Posts: 6,764


Re: Show Your System
Quote:
Originally Posted by SteelDirigible
the problem with your theory is that not all amps are rated at 1 ohm, nor did you specifiy this is what you were referring to. your math is right, but most mainstream amps are rated at 2 or 4 ohms.
i think your latest example is best, but your original statement was a little too vague to make sense.

I was referring to a 1ohm stable amp. But, does not matter. 2ohm or 4ohm amps, same math applies. Can you run a 2ohm amp with a 1ohm load? sure, just expect your amp to burn up.
Here is the math on a 5oow 2ohm amp:
500w x(2ohm / 4ohm)
5oow x (.5)
250w of supplied power to subs at 4ohm.
Lets take that same 2ohm amp with a 2ohm load (speakers)
500w x (2ohm / 2ohm)
500w x (1)
500w of supplied power to subs at 2ohm
Quote:
Originally Posted by tylork92
so explain how amps rated at 1 ohm can run at .5.....for instance my saz1500d rated at 1500 @1ohm but can be ran at .5. ive even seen a pair strapped at .5ohms (each amp at .25ohms and that was on a 16v setup.

It will still work and power the subs, but it will destroy the amp




12252011, 11:13 PM

Ford Pickup


Join Date: Dec 2011
Posts: 108


Re: Show Your System
Quote:
Originally Posted by pooleo
I was referring to a 1ohm stable amp. But, does not matter. 2ohm or 4ohm amps, same math applies. Can you run a 2ohm amp with a 1ohm load? sure, just expect your amp to burn up.
Here is the math on a 5oow 2ohm amp:
500w x(2ohm / 4ohm)
5oow x (.5)
250w of supplied power to subs at 4ohm.
Lets take that same 2ohm amp with a 2ohm load (speakers)
500w x (2ohm / 2ohm)
500w x (1)
500w of supplied power to subs at 2ohm
It will still work and power the subs, but it will destroy the amp

Do your research on sundown amps

12252011, 11:15 PM


Ban Survivor. (x2)


Join Date: Jun 2010
Posts: 6,764


Re: Show Your System
I dont care what the amp is, this is ohms law. This is how it works. There is no denying it!
If you want to pull the full power out of an amp, the subs need to match. Dont expect 500w out of a 500w 2ohm amp if you have a 4ohm load on the sub end.
Last edited by pooleo; 12252011 at 11:18 PM.

12262011, 08:07 AM

Ford Pickup


Join Date: Dec 2011
Posts: 108


Re: Show Your System
Quote:
Originally Posted by pooleo
I dont care what the amp is, this is ohms law. This is how it works. There is no denying it!
If you want to pull the full power out of an amp, the subs need to match. Dont expect 500w out of a 500w 2ohm amp if you have a 4ohm load on the sub end.

i completely understand that but im just saying that with an adequate electrical system it is possible to run a amp lower than its rated. Not all amps obviously but some are strong enough. Granted 95% of the time box rise will put you above your nominal impedence anyways.

12272011, 03:16 AM


Ford Driver


Join Date: Aug 2011
Posts: 116


Re: Show Your System
Running a Kicker CVX 12 on a 800 watt Diamond Audio amp. For the mids and highs i have 4 Arc Audio 5x7s and 1 Arc Audio 300.2 (rated at 700). This system hits waaaay hard.
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12272011, 07:05 AM


dumpster fire


Join Date: Sep 2010
Posts: 5,371


Re: Show Your System
^ what did you tune the box to? looks good, would like to have a box like that
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