my custom subwoofer

[demazi]

hi just thought id share what i will be getting in a few weeks

this is the amp that i will be getting
http://www.audiomarketplace.com.au/c...d,49/vmcchk,1/

im also thinking of getting this one instead what you think, which ones better.
http://www.jaycar.com.au/productView...Max=&SUBCATID=

and this is the sub
http://www.audiomarketplace.com.au/c...art/Itemid,49/

any input/ advice is welcome, i will be getting a sub box with a 6 or 8 inch vent soon dunno what size is best.

just thought id share.

cheers.

[Big Daddy]

I suggest that you read Building & Upgrading Subwoofers thread. It will help you with building your subwoofer. Document your work with pictures and post them there.

[MacDaddyOJack]

A 6" port is HUGE, I'd be skeptical of even going that big without doing some calculations first. I read an entire book on subwoofer cabinetry and adding ports gets pretty complicated. The size and length of each port depends on port diameter, driver parameters, and the desired tuning frequency of the box(whew!) Change any one of those and you have to recalculate your port size, length. Sometimes, depending on the driver specs, your port length may end up being multiple feet, not inches... That's why they make different diameters, so that you can hopefully cut the length down with a larger diameter.

The good news is that it's not rocket science and even if you mess up, you can do it again - that's half the fun anyways Just remember that because you spend lots of money on a sub and amp, you can't just slap them in a box and expect it to sound wonderful. The box is what really ties them both together. I can't remember the name of that book, but you should try to get your hands on one before you tackle the project.

As for your selections, the first amp(the bash one) looks better to me, and the driver looks pretty solid as well. I would think that you could make a very respectable sub with that combo.

One thing to be careful of - that free-air equivalent(Vas) for that driver is rather large at 324 liters or 11.45 cubic feet. You will have to have a very large box to get really deep bass from this sub. Something along the size my my subwoofer(<--see pics) As long as you don't mind a large box, that is a good driver.

[demazi]

yeh i was gonna make my own but cbf lol im going to go to GL prosound their a high end car audio place in australia that makes some solid box's and have heaps of advice on building a sub box, and yeh i dont mind big i got the dali concept 10's so lol big isnt a issue for me, thanks for the input