Well, pure garbage marketing anyway...
Without having the amp to actually clamp and test, this discussion is purely academic...
Just saying, the fusing is going to effectively limit how much real-world power this thing will do.
Looking at Boss's numbers though:
I believe they are either running 18 volts to get the '5000 watts peak @ 1-ohm', or a combination of other tricks like a modified square signal input, or 20,000Hz test tone - something you'll never see in actual use.
Without having the amp to actually clamp and test, this discussion is purely academic...
Just saying, the fusing is going to effectively limit how much real-world power this thing will do.
Looking at Boss's numbers though:
- 5000W Max x 1 @ 1 Ohm
- 3500W Max x 1 @ 2 Ohms
- 1800W RMS x 1 @ 4 Ohms
I believe they are either running 18 volts to get the '5000 watts peak @ 1-ohm', or a combination of other tricks like a modified square signal input, or 20,000Hz test tone - something you'll never see in actual use.
I can foresee a little discrepancy in calculating the AC output side of the amp from the DC input... but the formula you've listed is just another way to arrive at the 'calculated' number - (depending on what measurements you have available)... and there are many useable formulas in Ohm's law.
Ohm's Law Calculators
Without having hard data (voltage and amperage outputs from the amp) we can't use your formula in this instance (till someone can provide some actual numbers)... but it's also flawed to a degree in that it assumes a static impedance, whereas the impedance across a subwoofer is going to be reactive and change as the coil(s) heat and cool.
Either of these formulas will get us in the same ballpark.
//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif
Ohm's Law Calculators
Without having hard data (voltage and amperage outputs from the amp) we can't use your formula in this instance (till someone can provide some actual numbers)... but it's also flawed to a degree in that it assumes a static impedance, whereas the impedance across a subwoofer is going to be reactive and change as the coil(s) heat and cool.
Either of these formulas will get us in the same ballpark.
//content.invisioncic.com/y282845/emoticons/cool.gif.3bcaf8f141236c00f8044d07150e34f7.gif
Okay, but do you take the impedance at the first second of the tone? 3rd second? 5th second? See what I'm getting at?
The impedance will differ at all 3...
The formula(s) assume a perfect world, but we're talking about measuring imperfect human constructions. Again, either of the formulas being discussed should arrive in the same ball-park, but claiming one calculation being more accurate than the other is pretty relative, their both a piece of the same whole...
View attachment 26529460
The impedance will differ at all 3...
The formula(s) assume a perfect world, but we're talking about measuring imperfect human constructions. Again, either of the formulas being discussed should arrive in the same ball-park, but claiming one calculation being more accurate than the other is pretty relative, their both a piece of the same whole...
View attachment 26529460
you are making this way more difficult than it needs to be because,yes its all a calculation and yes it a piece of the whole,but if you have done this out put test there is a point where the imp rise stops rising,it does level off and yes again its all an imperfect test because the longer you play a given tone your voltage and amperage is dropping.i use the third second because the TermLab needs 2-4 seconds for an accurate reading but i know people that use the 2nd second,its all inaccurate though if you think about it.
---------- Post added at 03:02 PM ---------- Previous post was at 03:02 PM ----------
ok yes 1600 junk watts form a junk amp.
Was just pointing out you can't really claim one method is more accurate than the other - with the variables involved.
Kinda moot point if we don't have the numbers to plug into the formula you shared anyways...
Kinda moot point if we don't have the numbers to plug into the formula you shared anyways...
Hard to believe a boss amp got 4 pages in 1 day.
A few years ago a customer came with a boss amp, we opened it to take peak at the internals......... 3/4 of the amp was empty space.
A few years ago a customer came with a boss amp, we opened it to take peak at the internals......... 3/4 of the amp was empty space.
I think they're pulling it out of their a$$.
We don't need to justify their measurements, it's pure hogwash. They could label that thing as 20K RMS if they wanted to, and some kid would buy it and slap it in their prefab box with 2 Dual subs and some flashing lights, and brag about his 20K watt amp making his system the "loudest on the block". Boss products are aimed at the guy looking to rattle his trunk, even if it sounds like sloppy a$$. They aren't aimed to please hobbyists like us that have knowledge, their inflated numbers are there to take advantage of impulse buyers.
The reality is that that amp wouldn't put out 5K RMS if it was hit by lightning.
/\ /\ /\ hit by lightning...lol /\ /\ /\
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