loudlemans

Quote:
Originally Posted by xxPunk0Ramaxx
uhmmmm, not sure i understand this one. how?



i thought that it was pretty straight forward.....i could be wrong.....it's been known to happen

Justin LaRouche

^^^^this is not true! yes some companies boast more then the proper capasitance or even lie about it! how ever, there are some out there that truly supply that kind of capacitance. how they do it is by taking small one to two farad caps that rang from about the size of your pinky to the size of your thumb. the way they make them that small is buy only being about 2volts of opperating capacitance!

now just like a battery if u put them in series u now raise there voltage! and then if u put each parralelled row in series u now raise the capcitance!

if u don't believe something that small can hold that kind of charge. go and charge up a capacitor from your old motor bike, lawn mower or ford pick up! then throw it at a friend and watch his body giggle when the cap discharges on his skin! he won't like u much for it!

also not to mention the caps used for photo discharge! all of these are example of units that use similar technoligy.

now having said all of the above! i think that caps r the biggest crock in the industry!!!!!!

instead of doing what is suggested they produce a load on a systeme! a heavy one at that!!!

if u r draining a cap with a stereo something has to replenish it's power as fast as it is delivering the power. now doesn't that sound *** backwards??? that was the whole reason it was put into the system! better batteries and more alternator power are the way to go! not to mention the obvouis big three!!!!

justinstall!

Justin LaRouche

^^^^holly cow! batteries r not designed for quick discharge???????? even the crapy ones r capable of quick discharge. when u crank over a car especialy a v8 or bigger. the starter if u put an amp clamp on it will actually draw up aroud 600-800 amps on the initial start up to over come the initial resting enertia of the engine! and if u continue to hold the key in the on possition will move down to around 300 amps of current draw! (on a fairly typical v8)

so if this kind of power is not good enough for ya then hell i don't know what is! for that matter when i burp my spl car my amps draw a steady 318amps of current! seems like batteries r preaty capable if u ask me!!!! sorry every one i just cant stand misconseptions that send every one in different directions. makes me angry!

Haunz

iTrader: (3)

The .5-2F cans are generally a benifit... they will stiffen voltage and they will improve the transient response of an unregulated amplifier..

we are talking response times from 1/10 down to 1/100 of a second... and how well the cap works will depend on its inductance (ESL) in compairson to the inductance of the batt and wiring up to the cap... ESR describes losses..

as I say the small cans are generally of benifit; audible or not may be the question and I guarentee it will vary drastically from system to system...

xxPunk0Ramaxx

i am just extremely curious how adding a capacitor along the power line will cause a change in the signal and frequency response, especially in a diminishing manner at lower frequencie. how would a capacitor do this? why at lower frequencies only? i have studied capacitors for quite some time and have never ever heard this before, and by my existing knowledge on solid state electronics, i don't believe it to be possible.

SweetnLow91SC

Well.... the power line have a lot of influence on the sound. and its proven by the SPL guys. For Example: by not running fuses on power line gets higher SPL numbers. In SQ systems the difference in sound is more dynamic.

Now knowing what the system sounds like without the cap, compare to the system with the cap. Just install a one farad cap close to the amplifier, keep the wire short (max 12") from the terminals then listen to it again.

Listen to something like.. Level 42 World Machine, trk 1 for the kick drum. and trk 2 for the ultra low bass of the bass synthesizer.trk 3,4, for the snare drum slamm. that should give you a pretty good idea how your system producing the bottom end dynamically..

Usually the first impression is the midbass is much more punchier and low bass is tight. highs wise will depends on quality of the cap like Brax vs typical label swapping Sprague base cap etc.

How does a cap do that? The electrolytic one farad cap has a critical frequency at around 120 hz. this is where all the energy of the cap release into. Carbon type cap are much lower like 30 hz or so.(this is according to Alumapro) but the problem with large cap is...... if it gets drain from a loud bass note. it'll be a more of a load for a few milli second to recover and that could effect the performance compare to not using one.

The cap doesn't totally diminish the low bass, it just makes it too tight and unnatural sounding in most case. (more noticeble with 12" & 15" subs) What I'm saying is try it and see..

BassHamster

Wow, howmany threads, sorry (arguements) have we seen on this topic?
This is just an observation. Most of the people "arguing" on one side or another, dont really seem to FULLY understand caps. Most people are arguing opinions. Opinions are like @$$holes, everyones got em. But for some reason people here are turning their opinions into a crusade. Like buddy who said that he KNOWS that caps do absolutely nothing. Like one of the vendors said, they're a vital part of ANY amps power supply, but the manufacturers must of put them in there just to raise the price. The powersupply actually works on magic. I guess my rant really is in dis belief that so many un educated poeple are forcing their opinions on other people. If you like caps, use them, enjoy them. If you dont like them, dont use them. Its as simple as that. My only advice in here is to listen to the Industry pro's. This is what they do for a living. This is what puts food on their table. So they have to know what theyre talking about (most of them).

Grimmis1027

Switching power supplies, like those found in our computers, toys and car amps, switch at least 25Khz or more, and usally don't change freq much according to signal freq, some may use pulse width modulation (PWM) to control the output, but in most cases, the switching freq is set at a certain freq.

LOL, all a cap does is help the amp cope with peak power demands by acting like a small but fast charging battery, it also cleans up the power going to the amp by filling in any spikes or brownouts, including altenator whine and other electrical noise.

All power supplies need filter capacitors to work, without them, the power supply would be a very poor power supply full of 60hz hum (or altenator whine and noise)

Grimmis1027

Actually you would have no voltage because capacitors block DC but allow AC to pass, it's basic electronics theory.

I hope your not refering to a old spark ignition coil as a capacitor

Similar ?, it's the same technology actually, just the caps used are rated like maybe 35 kilovolts ?, at that voltage, they don't hurt, but rather can kill (stops the heart).

A capacitor, when fully discharged, acts like a dead short, till it begins to charge up.