I have a MAC and can't run WINISD

thobbinghotrod · #1 03-13-2011, 09:46 PM

I have an Earth 2 x 15 cab that I put 3015's in and want to know whats going on with the porting. It has a circle and a triangle cutout for each speaker that totals 14.7 inches in area. They are only as deep as the baffle (3/4 in). The speakers are separated and each have 1.89 cubic feet ( I haven't subtracted the volume of the speaker basket yet).

I like the sound but have to cut a lot of bass because it gets a little boomy. I have the mids cranked but that might be because of P quarter-pounders that I've heard are mid scooped.

Should I put some PVC ports in it and how long would they be?

will33 · #2 03-13-2011, 09:48 PM

Doesn't work on Mac last I know of unless something's changed.

longfinger · #3 03-13-2011, 09:51 PM

Does their online version work for you?

LinearTeam

thobbinghotrod · #4 03-13-2011, 09:52 PM

I didn't konw there was an online version, thanks.

will33 · #5 03-13-2011, 09:53 PM

So with the speakers and a bit of port roughly 1.8 per driver??

Can't do it right now but it can be done, several here have experience with these already. Most any port that's only the baffle thickness is going to be tuned high, there's the boom, along with the being a smallish volume assuming the figuring is correct. As far as lacking mids, it shouldn't unless there is so much of a bump it's masking them, make sure they in phase, ie: both pushing out and pulling in together, not either/or. I downloaded the newest WinISD in a new (to me) machine here and haven't put that driver in yet.

thobbinghotrod · #6 03-13-2011, 09:57 PM

I'm not understanding the online version, there's no place to put the volume of your cab in.

thobbinghotrod · #7 03-13-2011, 09:59 PM

to Will33, I don't have to push the mids with my jazz bass, so I shouldn't have even mentioned it.

kesslari · #8 03-13-2011, 10:01 PM

Get a copy of VMWorks and run Windows on your Mac. Then run WinISD on that. Windows runs better on my Mac than it ever did on my PC's.

NoGraveConcern · #9 03-14-2011, 05:42 AM

Car Audio - PORT Size Calculations and Formulas for WOOFER and Subwoofer BOXES

You can calculate port length/tuning with the above site. If you take the sq root of the area of that triangle you get the lengths for each side of a square. This allows you to use the square port dimensions in the above site to calculate tuning.

So, it looks like your cab is tuned to 75Hz.

That's a small box and high tuning. Not exactly ideal.

ButtUglyJeff · #10 03-14-2011, 06:33 AM

Quote:

Originally Posted by kesslari

Get a copy of VMWorks and run Windows on your Mac. Then run WinISD on that. Windows runs better on my Mac than it ever did on my PC's.

You can use Bootcamp, that's included. The difference is Bootcamp requires leaving OSX, and booting into Windows. I don't think the emulators are worth spending the $ on, unless you have multiple uses for it...

MuzikMan · #11 03-14-2011, 06:34 AM

When you do your simulations check out how the cab operates at max volume with only one driver using all of the cabs volume. You might find that one driver can keep up with two drivers below 100hz and have a smoother frequency response below 200hz.

billfitzmaurice · #12 03-14-2011, 06:41 AM

You need two 4" ID PVC pipe ducts each 12 inches long per driver.

BassmanPaul · #13 03-14-2011, 09:47 AM

Quote:

Originally Posted by ButtUglyJeff

You can use Bootcamp, that's included. The difference is Bootcamp requires leaving OSX, and booting into Windows. I don't think the emulators are worth spending the $ on, unless you have multiple uses for it...

You can run WinISD in Virtual PC, Parallels or if you have an Intel Mac you can run Windows natively. I seem to be posting this a lot lately.

thobbinghotrod · #14 03-14-2011, 12:01 PM

Thanks Bill, Thats a lot of Port, Can I do it with three 3 inch ports to cut down on the length?

NoGraveConcern · #15 03-14-2011, 01:25 PM

Quote:

Originally Posted by thobbinghotrod

Thanks Bill, Thats a lot of Port, Can I do it with three 3 inch ports to cut down on the length?

Doesn't work that way. The greater the port area, the longer the tube you need in order to achieve desired tuning frequency. The longer the tube, the more air you displace from the cab. The more air you displace from the cab the longer the tube needs to be to maintain that tuning frequency.

okcrum · #16 03-14-2011, 03:28 PM

Quote:

Originally Posted by thobbinghotrod

I'm not understanding the online version, there's no place to put the volume of your cab in.

Check the help. The cab volume is the Vb parameter.

fdeck · #17 03-14-2011, 04:32 PM

Try my speaker design program, written as a spreadsheet for Open Office. It should work on a Mac. Granted, you have to install OO, but that beats buying and supporting Windows just to run one program.

Rick Auricchio · #18 03-14-2011, 06:14 PM

An important note for all suggesting Boot Camp, VMWare Fusion or Parallels on the Mac: You need a full-install copy of windows, because these programs only provide the virtual "Bare metal" PC emulation.

A full-install copy of Windows is not easy to find (most are upgrades) and it'll usually cost well over US$100.

Turock · #19 03-14-2011, 06:26 PM

Buy a PC.

fdeck · #20 03-14-2011, 06:38 PM

A Mac is a PC.

So buy a Mac.