melb-bass
-
Posts
45 -
Joined
-
Last visited
Content Type
Profiles
Forums
Events
Media Demo
Store
Collections
Videos
Posts posted by melb-bass
-
-
Ilovebass, dont worry about thread jack, most my questions have been answered haha.
The comp ive entered is a db drag and its 30sec peak hold. So is it safe to say i ahould find a song that goes across different freqso it juggles around my peak?
I spoke to the guys running comp, the said to come early with a test cd and find my peak, then ill have a bank of songs lableled by the the max and min peaks and play a song from there.
Ia that a reasonable plan?
-
its a 30 second average and has to be music....although in the guidelines it says it can be a anything, eg magic mike, bass mekanic as long as it isnt a tone.
-
Hey guys,
Im entering my first competition Feb 6th. Soo Excited as this is the first comp im competing in.
A little bit nervous though, car is in the shop, head gasket decided to break so fixing that and running 0 gauge wires for 2nd battery. Should be ready in time for feb 6th.
For those of you dont know im running a budget build at the moment, 2 audiobahn AW121T 12" and powered by 800 rms.
Aiming for 150db LOL just kidding, being a first run just want to see where im at and how everything goes, amp is not even tuned properly, so anyone in Victoria, Aus, that has Oscope of DD1 greatly appreciate a tuning.
I was hoping from this post, i can get some feedback on peoples first time competing and some hints and tips of any sort.
Also music is another grey area, got some good stuff and looking around, suggestions are open.
cheers
-
i had a similar issue, the way i solved it was to take off the top peice and put box in the trunk, then screw down the top peice in the trunk.
prblem is that you cant seal the top permanently with glue or caulk, so i used a rubber lining between the top peice and the box.
Hope that makes sense
-
Its pretty good for first time, vocals need to blended in better with beat and clear vocal recording.
Hope to hear more though
-
good luck with the build, pics when its done.
i had a clarion couple years back, was a nice sub went good for what it was.
where did you find them for $50 each?
-
My subs are bottoming out.
I did some research and i think my port is to blame. there is not enough pressure... So im thinking of re doing it.
What are your thoughts, should i make it smaller opening or longer port?
Might even make the box smaller
Also i dont think im over powering them, got a kicker zx 750 and subs rated at 550rms each. Amp is not tuned to its max potential either.
Thanks
-
I was surprised myself with the amount of air it needs....But these do hit hard, harder than i expected.
Do you think if i make my port longer so its lower tuned, it would be good?
Also as i said, this is all just practice till i learn enough to go BIG.
-
Can anyone help me...
When you have 2 subs, doesnt it mean the box is doubled, to give each sub the air, or does it just share the box..
So for example, 1 sub requires 2cu ft box, does that mean 2 subs need 4cu ft??? thats the way i went with this....is that correct
thanks
-
Audiobahn provided some specs for the subs, they need total 3.5cu. ft. each. and 3.2 after port... so with trunk space i have to cut back, which i did.
Unless i have thought of the concept wrong, I assumed each sub needed its air, so i kinda doubled everything i worked out for a single sub. Should i just make the box 3.5cu ft. total for both subs or does each woofer need its own air?
Sorry for all these questions... Noob wanting to learn.
Cheers guys
-
thats what i used to make this box, also used bass box pro.
I just didnt understand all the port volume and area, and how much i need for a box haha.
-
I have finally finished my first box designed from scratch... Its all built and thumping hard, it sounds great hitting lows and shaking the car. Currently running off a kicker zx.750.
This is just a beginners box so i can learn the skills of box making and calculating, i am hoping to upgrade to some good quality subs in the future.
Still have to add another battery and change my 2gauge big 3 to a 0gauge big 3, and stronger alt...
Dimensions(external)
H: 15.5in
W: 31.5in
D: 23.5in
Port
H: 15in
W: 4in
L: 12in
From memory it should be 5cu ft.
Here are some pics.
I am thinking about doubling the port length to get it down to 28hz, because i think now its at 32hz.
I dont understand how to calculate port size and length, i just need someone to explain that to me. All the volume of ports and all that... Its the only part i guessed with this box. If someone can help me understand how to calculate port it would be great.
Neways i hope you like the box and can provide some assistance.
Also thanks to everyone on this forums, helped me heaps.
-
Box has been cut and ready to be assmebled.
Only thing that is worrying me is that i got the Port wrong.. ahh well, i guess live and learn.
-
from what i have designed, it should be, box tune freq at 42hz and port 32hz.
Is this good?
-
Its 11.5ish deep.
the port dimensions on that drawing are wrong, the width of port is 10cm(4inch) but the length is 11.5in deep.
-
Well this is the final design of the box, it has changed around 5 times till i got something that will fit, yep i built 5 test boxes to see if they fit in the trunk.
this box is roughly 40hz or there abouts, hope it sounds good.
What do you think?
-
The car is a 1997 ford sedan, but aussie version. and i was planning to put 800-1000rms on both at 2ohm.
-
This is just an experimental build, being my first build and all.
I dont want to really annoy the full pros on this since its not serious, but in the future i got some plans.
Really all im looking for is someone to say, yes thats perfect, or No try doing this and this.
-
ahh crap i did to hahaha those were in cm, my bad
h - 16 inches
w - 39 inches
d - 24.1 inches
-
Hey guys
Long time reader, first post.
Need help with my first box, i just want to make sure that i got everything right before i spend time and money.
i have had 2 12" Audiobahn aw121t woofers sitting around, and decided to do something about it.
I have all the specs listed below:
Fs - 33.4hz
qts - .64
Qes - .69
Qms - 8.89
Vas(litres) - 49
Vas(Cu. Ft. - 1.71
Re - 3.3
Le - 2.42mh
Mmd - 148grams
Xmax -
RMS - 550
Sd - .048
Freq Resp - 26hz - 1khz
Efficiency - 92.8
Displacement - .15
They recommended this for 1 sub for SPL:
air space - 3.2
port size - 4x10.5
port velocity - 6.54
-3db - 29hz
Tune freq - 38hz
Sub disp - .15
port disp - .141
total vol - 3.5 cu. ft.
My dimensions, designed to fit recommended SPL setup by AudioBahn:
Box
H - 40 in
W - 97.5 in
D - 60.25 in
Port
H - 5 in
W - 10 in
D - 12 in
Will this be the best setup to get some good numbers and hit lows.
If this is complete shit, can someone help me design a box.
Cheers
entering first comp....nervous
in General Audio - Can't find a category for your question? Ask here.
Posted
http://www.mobileelectronics.com.au/competition-1/measpl/
this is the comp i have entered.