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Ben Building

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Posts posted by Ben Building

  1. Final Draft

    in Subwoofers / Enclosures

    Posted

    All you need to do is open your port up and recalculate the tuning.

    You never want to curve your port if you don't absolutely have to. Air is a fluid, like water. Imagine water trying to flow through that port and you will get an idea of what will happen with air. It crashes into corners and created turbulence; which is the enemy of efficiency.

    With a box that long, you are going to want straighten that port up a lot. You may need 1 bend, if that.

  3. shop access!!

    in Off Topic - Random, Misc posts - the forum "Junk Drawer"

    Posted

    just got word that in two weeks time, i will have essentially unlimited access to the shop here at school :D

    going to be sick considering we have everything from routers to a non-critical nuclear reactor here :good:

    so stoked figured yall would appreciate my excitement..so i posted the news

    With all the proper tools, including the reactor(!), your work ought to be the BOMB!! LOL

    Be safe and have fun!

    BTW, make sure you post pics....

  5. Does Anybody Else Wear Cristian Audigier/ Ed Hardy?

    in Off Topic - Random, Misc posts - the forum "Junk Drawer"

    Posted

    I have like 4 ED Hardy and 3 CA shirts, some people like them, and some hate them, but mostly they don't understand why I would pay so much for a shirt.

    I have about 20 CA shirts and 8 Ed Hardy shirts (I get them cheap). Some of them I haven't even worn yet because they have hard to match colors.

    vcm_s_kf_m160_160x120-1.jpg

    Why would somebody pay so much for a t-shirt? Because they're friggin' HOT!

  14. Tahoe System Rebuild 2009 is ALL BUT FINISHED and PLAYING!!!! UPGRADE to RF P2 8's 12/08/2009!

    in Just Meade....my projects - Tons of SMD Builds here!

    Posted

    This is why I joined ths Forum.

    That battery bank alone is just sick. This definitely qualifies as a "stealth" system in my book because, when it's done, they will never know it contains an audio avalanche.

    I think we should declare an SMD Day. Then, Steve would have to redo his system AT LEAST once per year and everyone else could stay home from work and watch.

    http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif http://www.stevemeadedesigns.com/board/public/style_emoticons/default/hairtrick.gif

  15. 1 slot port divided into 2

    in SPL - SOUND PRESSURE LEVEL

    Posted

    Never been a big fan of split ports. If you want the sub in the middle of the box consider doing 1 port out the side...

    x2

    Two ports for the same port area simply increases the surface friction and temperature inside your port because two ports will have more surface area than only one. This reduces the overall efficiency of your whole subwoofer system with two ports as opposed to one.

    Boon, I am with you on this. Don't the multiport enclosures sometimes sound like they are wheezing? This, I think, is because of the surface friction inside the ports/

  16. i dont understand quarterwave design at all.

    in Subwoofers / Enclosures

    Posted

    ok, i understand length/tuning and size now, but dont you need like acceleration chambers, slaughter chambers, this chamber that chamber and every chamber inbetween? and can the whole box be one long port the same width??

    You can make it ultra-complicated if you want to; then your box will never get built. Just read the T-line post and trust the numbers.

    I have built a lot of enclosures and sometimes I still get butterflies waiting to see if it will sound good. They always sound just like they were supposed to and yours will too if you take your time and do it right.

    Just do it! If you get stuck on anything, just post your questions on the Forum and I'm sure someone will help you.

    Good luck! :hairtrick:

  18. EXPLAIN THE PHYSICS OF RUNNING ONE WOOFER VS TWO

    in Subwoofers / Enclosures

    Posted

    db is a pressure reading. subs make pressure by moving air back and forth.

    generally two subs have more cone area and can move more air per cycle than a single sub.

    now when u have a massive spl sub like u said most likely it will have a longer throw than the other subs which will make up for the less cone area. so it can move more air because the sub itself moves more.

    as for the power, more power moves the cone farther, meaning it moves more air. therefore more power=more pressure.

    the box is a whole other beast thats more complicated

    Good answer.

    Also, with two subs, you have two separate voice coils to dissipate heat and two separate motors to create kinetic energy. Sometimes, two smaller motors can be more efficient than one monster slug because of thermal management and mechanical factors (i.e. a huge, stiff suspension to damp 1000s of watts).

    To make things simple, you should look at your vehicle to determine what would be best for IT. That one monster will definitely outperform two lesser subs if you don't have the space for them, for example.

  19. 4 15,s or 2 18,s

    in Subwoofers / Enclosures

    Posted

    Four of these would stomp 2 18 inch BTLs for under $1200 assuming you have both the space and the power for them.

    http://www.lanzar.com/itempage.asp?MODEL=OPTI1533D

    3000 watts RMS with dual 1.2 ohm coils. They would be great on 4 AP30001Ds. Or, with 1.2 ohm coils, you can run one large amp at .8 on 3 of them.

    There is also the Optidrive 1535D that handle 1600 watts RMS with the same basket as the old AAs, 3 inch coil (dual 1.2 also), and triple stacked magnets for about 30% less money.

  22. lanzar subwoofer??

    in Subwoofers / Enclosures

    Posted · Edited by Ben Building

    planet audio makes a sub thats very very simular to them now the big bang series

    You're right, James. Planet Audio's BB12 and BB15 look very similar to the Lanzar 32 Series. They have the same basket, after all; but the Lanzars are a little more beefy than the BBs. The 1232s handle 1100 watts RMS (easily), whereas the BB15, for example, only handles 750 watts RMS.

    The Lanzars have a BIG spider, triple stacked magnets, and an aluminum cone on a 3 inch VC. The new 1533s we were discussing also come with a 3 inch coil, but I suspect it's a real slug.

    I will have to measure the parameters of the 1533s when they arrive, but will post the numbers calculated later.

  23. lanzar subwoofer??

    in Subwoofers / Enclosures

    Posted

    Ben's 1533Ds will arrive on Thursday. The 1232Ds that I have now were on in the FS section for a while, but they perform so well that I couldn't bear to sell them for lowballers. Sentimental value, if you will.

    Here they are shown with Kicker L7 12" subs for perspective:

    Image160.jpg

    Image158.jpg

    Image165.jpg

    We had been waiting for the 33 series to start shipping for a while and they are finally out, so these are the subs to replace the venerable old 1232s. I would put those old 12s subs up against DCs lvl 4 12" any day of the week.

    I'm not going to say that the 1533s will perform like BTLs or anything because I haven't played with them yet, but I predict it will be very close. :diablo:

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