Take a sub, have some sort of capacitors built on it, in it, however you want.
When you have an amp hooked up to it, the caps will start to store all the energy that the amp is supplying but the sub is not playing anything, it's building power for pure SPL.
When the caps fill up completely, let's say 20,000 watts, it just unleashes that power for 2-5 seconds. Why hasn't this been thought of? I'm sure by doing this, records could be set a lot easier.
posted
Well for one, caps store power in DC voltage and it takes AC voltage to make a sub move. Also to store a large amount of power for 2-5 seconds is going to require a huge physical size.
Posts: 2575 | From: GA | Registered: May 1999
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posted
People use tons of batteries to supply short bursts of power to the amplifiers. That's about the extent of the majority of power storage in SPL vehicles. As mentioned above, capacitors only store electricity if it flows in as DC. They pass AC. Some pass it to a greater extent than others, but they can't store AC.
posted
Well, maybe the terminology is wrong so let me take a different approach on the topic.
I know this amp is illegal in comps but the Harrison Labs Drag Queen amp states it can do 20,000w for like a couple seconds and only needs 30 amps worth of draw to work.
I'm sure most of you guys know why, Internal batteries in the amp is what makes it do so much.
So... Let's say you build a subwoofer and have a big casing around the sub with the motor structure and magnet inside of it along with these little batteries lets say.
Just like the amp, it steadily draws and builds up current until BOOM!!!
posted
Well you could just put the drag queen inside the subwoofer casing like you were talking about. But again just putting bateries won't work, they store DC and you need to have AC. So what you need to have is an amplifier and input signal, or some sort of oscillator. You could put all of this inside some sort of subwoofer casing but I don't see the benefit
Posts: 2575 | From: GA | Registered: May 1999
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posted
First off, putting a capacitor on the speaker side of the amplifier circuit will result in nothing more than an 6dB/octave crossover that is going to smoke itself when you put that much power into it.
As far as building up a capacitor bank on the 12V side, it is a great idea, and it has been done. Tons of batteries are used because they can store much more power than a capacitor bank of the same physical size and cost. And batteries work fast enough in this case that it will do exactly what you're thinking.
-------------------- 1995 Grand Am GT Nakamichi CD-45z Pair of Audiocontrol EQT's Audiocontrol 4XS Crossfire TEK100.2 Illusion Audio ND-6 Crossfire VR142 Image Dynamics CD1E V.2
Looking for the following: Image Dynamics IDMAX 12" Crossfire BMF1000d or VR1000d Posts: 48 | From: Buffalo | Registered: Oct 2002
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posted
You're suggesting that you can use the stored up power to run the speaker. This is intuitive but only from the standpoint that the speaker requires power and the capacitor provides it.
A stiffening capacitor, the conventional use, is pre-active component, such as in the power line before an amplifier.
The amplifier takes a DC power supply and an AC signal, steps the DC signal up to provide two voltage rails that are of higher voltage than the original DC connection and then takes the AC input signal and "drags" it towards the voltage rails. This makes the AC input signal much bigger. Then the amplifier provides enough current to drive the load, and you connect them. All this requires significant current on the lines that carry the DC voltage, and, when the AC signal gets really complex, it requires a quick SPIKE of a lot of current. The stiffening capacitor responds to the drop in supply voltage caused by a flow of current by providing current of its own to keep the voltage up.
In a speaker, you have the AC input signal driving the cone through its convolutions. If you put a DC component such as a capacitor in parallel with this, the cap will simply drive current through the coil of the speaker until all of it is exhausted-- the cone will only move in one direction. If you put the capacitor in series with the speaker, when the voltage goes up, it will charge the capacitor (keeping power FROM the speaker) and when the voltage goes down, it will discharge the capacitor, (providing power TO the speaker) which means that the capacitor will pass the signal while taking a little bit out. When the frequency gets really low, the capacitor charging and discharging actually removes a good portion of the "AC" of the signal and actually makes it look more like a constant DC voltage, which means that it actually "filters" out low frequencies, as stated above.
ShadowStar
-------------------- You can't build a reputation for what you're GOING to do.. But you can build one for TALKING about it!
It's all about knowledge, love and respect. Posts: 2578 | From: Somewhere In the Northeast | Registered: May 1999
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