Watt Age

Posted on | March 26, 2008 | 2 Comments

Watt Age

I wanna get 2 15" woofers in my blazer..?

with a box, wiring, and a nice radio that i can plug my ipod into, how much are we looking at? i know there are lots of different watt'ages, and stuff like that.. but can i get some prices for all of it? thanks

here's the thing bill, you left it way to open... to get high quality stuff, and the car electronic upgrades , with 2 15" you could easily hit a $5000 dollar mark without trying. or you could go cheap and get walmart brands and have 2 15" just for looks and spend well under $1000.

In my opinion, first create a price for yourself, then ask yourself what is it your looking for sound quality, high spl or a bit of both... then start the research process you may find you dont want 15" at all... bigger is not always better. there are single 12" drivers out there that can break 150DB... and 15's that dont come close..even if you have 2.. just depends on what your after.

in regards to the option below me.... it seams silly to have a sub box that big (over 4 cu ft) that only holds 700watts RMS further more that amp will only put out 500 watts to the load he specified...(2x dual 4 ohm coils = 4 ohm total load) why take up all that room for 500 watts?
In general though they are good brands, just you need to plan out better, that sam eamp is 1000 watts if you just had a different load, in fct why not 1 15" @ 1000 watts?

As a comparison i have a jeep wrangler and have 600 watts to a single driver in a area just over 1 cubic foot.

Project 10^100 Bit & Watt AGE

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The Batch reactor is the generic term for a type of vessel widely used in the process industries. Its name is something of a misnomer since vessels of this type are used for a variety of process operations such as solids dissolution, product mixing, chemical reactions, batch distillation, crystallization, liquid/liquid extraction and polymerization. In some cases, they are not referred to as reactors but have a name which reflects the role they perform (such as crystallizer, or bio reactor).
A typical batch reactor consists of a tank with an agitator and integral heating/cooling system. These vessels may vary in size from less than 1 litre to more than 15,000 litres. They are usually fabricated in steel, stainless steel, glass lined steel, glass or exotic alloy. Liquids and solids are usually charged via connections in the top cover of the reactor. Vapors and gases also discharge through connections in the top. Liquids are usually discharged out of the bottom.
The advantages of the batch reactor lie with its versatility. A single vessel can carry out a sequence of different operations without the need to break containment. This is particularly useful when processing, toxic or highly potent compounds.

Agitation
The usual agitator arrangement is a centrally mounted driveshaft with an overhead drive unit. Impeller blades are mounted on the shaft. A wide variety of blade designs are used and typically the blades cover about two thirds of the diameter of the reactor. Where viscous products are handled, anchor shaped paddles are often used which have a close clearance between the blade and the vessel walls.
Most batch reactors also use baffles. These are stationary blades which break up flow caused by the rotating agitator. These may be fixed to the vessel cover or mounted on the side walls.
Despite significant improvements in agitator blade and baffle design, mixing in large batch reactors is ultimately constrained by the amount of energy that can be applied. On large vessels, mixing energies of more than 5 Watts per litre can put an unacceptable burden on the cooling system. High agitator loads can also create shaft stability problems. Where mixing is a critical parameter, the batch reactor is not the ideal solution. Much higher mixing rates can be achieved by using smaller flowing systems with high speed agitators, ultrasonic mixing or static mixers.
Heat cooling systems
Products within batch reactors usually liberate or absorb heat during processing. Even the action of stirring stored liquids generates heat. In order to hold the reactor contents at the desired temperature, heat has to be added or removed by a cooling jacket or cooling pipe. Heating/cooling coils or external jackets are used for heating and cooling batch reactors. Heat transfer fluid passes through the jacket or coils to add or remove heat.
Within the chemical and pharmaceutical industries, external cooling jackets are generally preferred as they make the vessel easier to clean. The performance of these jackets can be defined by 3 parameters:
Response time to modify the jacket temperature
Uniformity of jacket temperature
Stability of jacket temperature
It can be argued that heat transfer coefficient is also an important parameter. It has to be recognized however that large batch reactors with external cooling jackets have severe heat transfer constraints by virtue of design. It is difficult to achieve better than 100 Watts/litre even with ideal heat transfer conditions. By contrast, continuous reactors can deliver cooling capacities in excess of 10,000 W/litre. For processes with very high heat loads, there are better solutions than batch reactors.
Fast temperature control response and uniform jacket heating and cooling is particularly important for crystallization processes or operations where the product or process is very temperature sensitive. There are several types of batch reactor cooling jackets:
Single external jacket

Batch reactor with single external cooling jacket
The single jacket design consists of an outer jacket which surrounds the vessel. Heat transfer fluid flows around the jacket and is injected at high velocity via nozzles. The temperature in the jacket is regulated to control heating or cooling.
The single jacket is probably the oldest design of external cooling jacket. Despite being a tried and tested solution, it has some limitations. On large vessels, it can take many minutes to adjust the temperature of the fluid in the cooling jacket. This results in sluggish temperature control. The distribution of heat transfer fluid is also far from ideal and the heating or cooling tends to...(and so on) To get More information , you can visit some products about Broadband TV Channels, Decorative Glass Plates, . The PVC Solid Sheet products should be show more here! 

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