Nobody needs capacitors apparently...
06-12-2007, 07:11 AM
#21
50 Watt CAFz'r
Join Date: May 2006
Posts: 78
I was talking about capacitive reactance, it only exists in AC circuits as In AC and DC capicitors act in a completely different manners (actually the same manner but because its AC it serves completly different purposses)
Anything wired in Parrallel with the system won't present any resistance, thats the nature of electricity. Yes increasing load on your line will increase its resistance but barely and if you put a heavier guage wire (that you should already have on a proper install), problem solved.
Electrolytic Capacitors don't commonly come over 350V rating, there are occasions of higher ratings but these are rare with this type of cap so I hope you aren't using these with 480V
I was wrong about the light bulb thing I thought LED's were much more efficient than that but I was mistaken, but he used ESR formulas to figure out his efficiency, he was wrong to do that because the caps aren't in series and if they were the system wouldn't run the cap would charge and the flow of electrons will stop.
Caps have infinite resistance when charged in a series DC circuit (well in a perfect world every dielectric leaks a small amount of charge) but from a math stand point they are an open circuit
Where did this number come from, why is the author affraid to show his math?
That power would have been used anyway by the stereo, the cap isn't using power its storing it for a later use. What the cap is doing is smoothing out the draw on the system.
I guess thats what he could have meant
We both agree on this point
Anything wired in Parrallel with the system won't present any resistance, thats the nature of electricity. Yes increasing load on your line will increase its resistance but barely and if you put a heavier guage wire (that you should already have on a proper install), problem solved.
Electrolytic Capacitors don't commonly come over 350V rating, there are occasions of higher ratings but these are rare with this type of cap so I hope you aren't using these with 480V
I was wrong about the light bulb thing I thought LED's were much more efficient than that but I was mistaken, but he used ESR formulas to figure out his efficiency, he was wrong to do that because the caps aren't in series and if they were the system wouldn't run the cap would charge and the flow of electrons will stop.
Caps have infinite resistance when charged in a series DC circuit (well in a perfect world every dielectric leaks a small amount of charge) but from a math stand point they are an open circuit
Regarding using an AC formula to calculate the figure of 0.017 ohms, he
never once stated that this was a reactive impedence figure. In fact his
analogy with the "unobtanium" explains the concept perfectly
never once stated that this was a reactive impedence figure. In fact his
analogy with the "unobtanium" explains the concept perfectly
If he were to include the decrease in resistance,
it would actually show more power being drawn from the battery since in
paralell, P=V^2/R, and lower R results in more power.
it would actually show more power being drawn from the battery since in
paralell, P=V^2/R, and lower R results in more power.
The "cycling" of the cap he mentioned will be dependent on the frequency
being played. Since each sine wave cycle has a positive and negative
peak, and each of these peaks is supplied with a DC power supply
being played. Since each sine wave cycle has a positive and negative
peak, and each of these peaks is supplied with a DC power supply
While the writer's argument seemed biased in that he went in to prove a
theory and chose his values to support it,
theory and chose his values to support it,
06-12-2007, 07:38 AM
#22
Heres my 2cents. If you want a cap buy one, if you dont want one, than dont. But I've done it both ways. And I Enjoy the sound of my systems with a cap than without. Caps are only used when you need the extra power that your car battery cant supply. Its good for songs with alot of rapid base so that the base doesnt fall behind the music. This is how I look at it, and I dont care what anyone thinks of my opinion. Im always right
06-12-2007, 07:55 AM
#23
Originally Posted by midnight_breeze
Heres my 2cents. If you want a cap buy one, if you dont want one, than dont. But I've done it both ways. And I Enjoy the sound of my systems with a cap than without. Caps are only used when you need the extra power that your car battery cant supply. Its good for songs with alot of rapid base so that the base doesnt fall behind the music. This is how I look at it, and I dont care what anyone thinks of my opinion. Im always right
your bass is FAT that is why it falls behind
the cap is like an energy drink you only get a brust of power
but losing the lbs helps the most
so start feeding your bass better
sorry hahahahah
06-12-2007, 11:27 AM
#27
0 Watt CAFz'r
Join Date: May 2007
Posts: 28
me and some friends made tests about caps, ge got those scores:
On SPL Audiocontrol
Without Cap 149.8
With Cap 150.1
On TermLab
Without Cap 148.6
With Cap 148.4
So I guess the results are obvious, on the audiocontrol, theres only one peak of Db selected, while on termlab there are 3 seconds of lecture, the cap discharges, and when it's empty it has to recharge, and he uses power from the battery to do so, and for a fraction of a second, before he reaches the same voltage as the rest of the electrical system, he becomes a load to the alternator...
mabe i'm not exactly right, but those are our results. Having a Cap is okay, its a band-aid, but for SPL, it's not a solution, For SQL, it could be useful
On SPL Audiocontrol
Without Cap 149.8
With Cap 150.1
On TermLab
Without Cap 148.6
With Cap 148.4
So I guess the results are obvious, on the audiocontrol, theres only one peak of Db selected, while on termlab there are 3 seconds of lecture, the cap discharges, and when it's empty it has to recharge, and he uses power from the battery to do so, and for a fraction of a second, before he reaches the same voltage as the rest of the electrical system, he becomes a load to the alternator...
mabe i'm not exactly right, but those are our results. Having a Cap is okay, its a band-aid, but for SPL, it's not a solution, For SQL, it could be useful
06-12-2007, 12:25 PM
#28
Originally Posted by Prolifik
hey fire electrical guy explain this to me.
why does my spl drop when i put a cap in? i've tested up to a 0.5 db gain when cap is removed from a stereo.
why does my spl drop when i put a cap in? i've tested up to a 0.5 db gain when cap is removed from a stereo.
