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lost on where to start on building a sub based for music - Page 2

post #31 of 88
Thread Starter 
Yeah i saw that just all around sick amp. I like crowns new line of amps.smile.gif
post #32 of 88
Thread Starter 
http://www.parts-express.com/pe/showdetl.cfm?partnumber=268-353

so would that port work times 4
post #33 of 88
yeah, they would work, i just hate to see anybody spend so much money on ports.

how would you feel about saving some money and going for a slot port?
post #34 of 88
Thread Starter 
I thought about going that route as well with one 18 inch 8 inch port right? This is my first build!
post #35 of 88
"I thought about going that route as well with one 18 inch 8 inch port right?"

i know it seems a little nuts, but yes, you've got it...the same cross-sectional area by the same length gives the same tuning. ideally, you want some roundover around the ports, but for your purpose where you are going to have all kinds of high spl music masking any port chuffing, i'd say go for it.

"This is my first build!"

ideally, two cabs to help smooth room mode effects, but if you *must* have a single cab, not a bad choice.
post #36 of 88
Thread Starter 
4 inch tall right by 8 wide by 18inchs long right.
post #37 of 88
just to make sure that everyone is on the same page and that you don't get bad advice, what dimensions have you arrived on for the cab?
post #38 of 88
Thread Starter 
23x23x23
post #39 of 88
that will house one sub. for two, it would have to be twice as large.
post #40 of 88
Thread Starter 
well i have decided i want to build two separates so my final dimensions would be a 23x23x23 with a 4inch tall by 8inch wide by 18 inch port?

the only thing i question is do i put any type of acoustic foam or something in side the box or just bare wood and also what would my actual cuts be to make the inside of the box 23x23x23 inside the box?

the height of the box and overall size of the box will be perfect to put my big Cerwin Vega d-9s on top of the subs so the tweeters and mid will be at a ear level!!!

smile.gif
post #41 of 88

23x23x23 external dimensions using 3/4" wood = 5.75 cubic feet internal volume

http://www.hometheatershack.com/forums/enclosure-volume-calculator/#axzz2DdpbHNDo

 

I like the 20hz tune better, not much of a difference at 30-50hz. Going with a 30hz tune creates a big peak so its not flat.

 

1000

post #42 of 88
Thread Starter 
on winisd what dose pe and dia and z stand for on the driver
post #43 of 88

pe = power handling (watts)

z = nominal impedance

dia = I'm guessing its the diameter of the driver...

 

You should be using the alpha version of Winisd.

post #44 of 88
Thread Starter 
i cant seam to get this to work
post #45 of 88
that happens to just about everybody. :-)

make sure all fields are clear, then
enter qes then hit tab, enter qms
hit tab a couple times and let it calculate qts
hit tab a few times to move to mms
enter mms, re, bl, le, sd, xmax, and pe
by using tab after entering each data, it will calculate what it needs to
i no longer get any conflicts
post #46 of 88
Thread Starter 
well i got it to work now i cant replcate your results lol
post #47 of 88
Thread Starter 
post #48 of 88
here is what i'm looking at before you slap on the high pass filter.



post #49 of 88
Thread Starter 
with the port size of 18 inches in leght 4 inches tall and 8 inches wide thats a tuned port at 27.59 hz
post #50 of 88
ah, i was talking about two 4" diameter round ports that were 18" long. that tunes a 5 cubic footer to 25hz.

if you want to go with a slot port, that will work too. now that you have a hang of winisd, you can experiment and see what works best.
post #51 of 88
Thread Starter 
well is that all ill need from parts express?
post #52 of 88
Thread Starter 
one 4 inch buy 4 inch by 19 inches port would really make that sub sing in the 46 hrz area after all i do still have my big 15s in my vegas and they hit real hard most of the time
post #53 of 88
Thread Starter 
well its official ill have 2 15s buy the end of next week
smile.gif
post #54 of 88
Quote:
Originally Posted by tylerlovely2006 View Post

well its official ill have 2 15s buy the end of next week
smile.gif

*3 months later*
"Ok my windows rattle, but now I want my teeth to rattle. Do I need six more?"cool.gif
post #55 of 88
Thread Starter 
Nope just want some more quality low end sound for when i really dont want to crank the volume nob up
post #56 of 88
Quote:
Originally Posted by tylerlovely2006 View Post

one 4 inch buy 4 inch by 19 inches port would really make that sub sing in the 46 hrz area after all i do still have my big 15s in my vegas and they hit real hard most of the time

I've been running a set of Cerwin Vega E715's for years and I never used to think I needed a sub because I thought the 15's in them hit hard enough but I was wrong... I found a really cheap sub on close-out one day and bought it and the improvement in the sound was so amazing I couldn't believe it. A few better subs later and now with an F20 and the system finally sounds the way I always wanted it to. The mids and highs in the CV's are great and keep up with the bass but the 15's are better suited to mid bass.

You're going to be very happy!
post #57 of 88
Thread Starter 
oh yeah i cant wait to fire these up in the room to some of my favorite tunes i am at least a month out or so tell ill have them done! but when there done you all will get to see all the steps im going to take to make them sing!
post #58 of 88
Thread Starter 
So on my cuts on the box i would take into account for the 3/4 inch mdf on the sides and top and bottom right? So my front and back will be 23x23 sides would be 21.50 x 21.50 and top and bottom would be 23 x 21.50 right?
post #59 of 88
Quote:
Originally Posted by tylerlovely2006 View Post

So on my cuts on the box i would take into account for the 3/4 inch mdf on the sides and top and bottom right? So my front and back will be 23x23 sides would be 21.50 x 21.50 and top and bottom would be 23 x 21.50 right?


Have you ever used google sketchup? If you have some free time, its easy to learn and gives you a nice visual with exact dimensions of what your enclosure will become.

post #60 of 88
Thread Starter 
well the 15s arrived today i dont have a day off tell tomorrow and ill get started on the boxes
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