Porch Enclosure

Current, voltage, associated wth?

If it is from anywhere outside America then the Red is for Active (power) Pretty much every other country the three phase’s are red, white and blue, (unless it is flex-lead) and earth is always Green and yellow. In a single phase application red is hard active, white is switched, and black is neutral. However sometimes in industrial applications purple and pink are used, sometimes for the extra low voltage AC or DC Controls, This is pretty common for alot of pannels from asia.

If it is a motor terminal box (espechally a 3 phase) the colours are differnet again for the start and finish of the field windings.

Hope that was relevent and made sence.

I searched a couple websites and only found enclosures that supported drives up to 2TB. I’d like to get one that supports larger drives than that, so I can continue to use the enclosure in the future when drives are above 2TB.

Thanks!

External Single drive enclosures are so cheap, like $15-$20 it really shouldn’t be an issue. By the time you think you need to go to a larger drive, the interface technology will probably have changed and you’ll need a new one anyway.

You can get a Rosewill R25S for $40 that holds 2 x 2TB drives. Are you storing the Vatican library or what :))

Do you have to make seperate enclosures for each sub or can you just make it one big open space on the inside?

As long as you measure the air space right, you can have just a single chamber, but I believe you will get a harder bass with 2 separate chambers…

Will a driver have a lower or higher impedance in different enclosures? (small, large, sealed, ported)
This question is based on the idea that every kind of motor (system that converts electrical energy to mechanical energy) I know of will have lowered resistance under greater load, so I would imagine that if a sub had to drive a greater moving mass (e.g. had a larger port size) it’s impedance at a constant frequency would reduce. Any thoughts?

No, the enclosure affects the pressure wave only.
Any electrical charge generated by the woofer picking up that pressure wave(acting as a microphone) will be relatively negligible.

It’s something that seems to have just been invented in the last two years or so. I assume that it’s to muffle the sound of the drums so that they won’t overpower the audience or the rest of the band. Still, I think it’s really weird, especially since people have played drums in bands for generations and have never done this before. Why have they started doing it now all of a sudden?

They can also be useful in roadhouses for shielding the drummer from flying beer bottles and zippo lighters.

I have been trying for 3 hours and my brain is about to explode. Can someone please show me how to solve this problem.
You have 800 feet of fencing and you want to make two fenced in enclosures by splitting one enclosure in half. What are the largest dimensions of this enclosure that you could build?

800/5 is 160

Make it 160 feet wide and 160 feet long and then put a fence down the middle of it

The other guy is probably right.

Whenever I click in the View HTML Source box and try to add an enclosure, then post it and go back to the code, it doesn’t save it.

http://brandon.fuller.name/archives/hacks/mtenclosures/
I was searching the web and seen a few things there so type into your web search your question and you may come up with the HTML code.
http://www.cadenhead.org/workbench/news/2424/multiple-item-enclosures-rss-20
This is the first time for me to hear about this. So l am new to this also.
If you have a friend that did this also, then you can ask for their help

I’m thinking about getting a ported fiber glass enclosure and just want to know which is better concerning sound quality and bass production.

Typically fiberglass enclosures are chosen for two reasons. The first is if you have a tight space and need all the volume you can get. The second is for unique enclosure that looks great. Fiberglass enclosures can be unique shapes unlike MDF enclosures.

Audibly there will likely be no difference between a fiberglass enclosure and an MDF enclosure. If you were choosing fiberglass just because you want it to sound better then you should reconsider and just go with a MDF enclosure to save money.

One benefit of fiberglass enclosures is that they are easily made very strong just by adding some more fiberglass mat on the enclosure. By doing this you can easily make a much stronger enclosure then an enclosure made from MDF. This means less flexing which results in more output.

One thing many people don’t do when making a fiberglass enclosure is design the enclosure to fit the sub. By that I mean people don’t make the enclosure to the correct volume and tuning frequency (if ported). This results in bad sound from your enclosure. It is still very important to make the enclosure to fit the specs of the sub.

Bottomline, fiberglass and MDF with be audibly the same when properly built. Go with MDF for a basic enclosure and go with fiberglass for a unique looking enclosure.

Good Luck!!!

I recently pulled the hard drive out of my old computer which used Windows 98 as its OS. I want to purchase an external enclosure in order to get the data onto my new Vista system, but wasn’t sure if the archaic OS would get in the way of this. The old computer is a total loss so this seems to be my best option if it works. Any help would be most appreciated.

you can get an enclosure, or a IDE to Sata adapter and put it internal.

you wont have to format it, you can plug it in once windows has started. and you will be able to access it to get all your stuff off, or what you want to get off, and then format it to a diffrent file format if you want.

if you do come into problems on startup, if could be that windows has set the new drive as first boot drive. just enter bios by pressing DEL on startup repeatedly dill a blue screen comes, DONT CHANGE ANYTHING HEAR! just go through the menu and find boot sequence, and change the sequence so that it boots from the internal drive, and disable the external booting. (BTW, if you ever have a booting issue, were you have to boot from Disc, you should change the dvd drive to be first boot in there).

Continued——-or 37 Hz and i know thats hertz but i don’t understand what they mean by tunning it? Or what hertz is, Thanks to all that help.

For ported enclosures the enclosure will be "tuned" to a certain frequency. The tuning frequency used will determine how the sub will perform as well as a few other factors.

Typically, an enclosure tuned higher like at 37Hz will be designed more for loudness and SPL. You will typically lose sound quality to gain output. To gain sound quality you will typically tune the enclosure lower. 33Hz is typically a frequency that will give a good mix of sound quality and output. This is all general as every sub will be different. All subs will have different tuning frequencies that they will perform the best at.

The actually frequency a ported enclosure is tuned to depends on several factors. These are a) the internal volume of the enclosure (not including the port or sub displacement) b) the cross sectional area of the port (height x width of port) and c) the length of the port. If you know all of these factors you can determine what the tuning frequency is.

Actually designing a ported enclosure is a bit more involved then just figuring out the size of the port you need to get a certain tuning frequency. You need to take into account other factors such as what cross sectional area you need to not have port noise. You also need to make sure the port is not too long that it is not practical for your application.

Good Luck!!!