[John Wigginton]

Hello everyone. Love this forum I haven’t posted in 10 years. I used to have a bic 12” pl I believe 100. I’m getting a new sub and thought I would build.

I bought mdf fiberboard today and cut into a square measuring 17”. I planned on cutting that in half for a triangular corner sub. I planned on using a Dayton 15” sub not reference or acoustimax. The sides are 2’ for hypotenuse and 17” by 40”.

Due to a calculation error I thought I had things dialed in, but it’s actually about 2.9 cu ft instead of the 3.83 I was aiming for based on parts express calculations fir a sealed enclosure.

I was going for quality LFE but could be persuaded to SPL and thus adding a port. I have more mdf so I could turn it into a rectangle, a pentagon or some other polygon. I could also buy a larger or smaller speaker more suited.

How much will this smaller volume effect the sound quality ?

I’m open to any suggestions from pros. Will measure room when I get home but believe it is around 9’x10’ w 12’ a frame ceilings and open to kitchen on one side. Currently have a velodyne 10” and an aura bass shaker.

Thanks!!!!

 

[lknhomeaudio]

Tell me exactly which sub it is, and I'll model it and show you what you're missing out on.

Honestly, without even looking, I'd say between 2.9 and 3.8 it's very little. 1-2dB down low, max.

 

[John Wigginton]

My man thanks so much. Let’s go this one:

https://www.parts-express.com/dayton-audio-dcs385-4-15-classic-subwoofer-4-ohm--295-206

 

[John Wigginton]

What program do you use? I tried to find a good one.

Also curious how this would work

https://www.parts-express.com/dayton-audio-dcs450-4-18-classic-subwoofer-4-ohm--295-475

 

[lknhomeaudio]

Turns out, you more than likely aren't missing out on anything noticeable. 2dB from 50hz on up.

I limited the excursion to 9mm on each one. The 2.9ft box takes 200 watts to reach xmax, and the 3.83ft box takes 140 watts.

Yellow is 2.9ft, red is 3.83ft

 

[Chris Popovich]

You can always LT it to whatever response you were looking for (within power and excursion limits) with a minidsp. Linkwitz transforms are cool things, just don't get greedy.

Chris

 

[John Wigginton]

I’m just looking for a configuration that will go substantially deeper than a bic h200 I believe that was my last good sub for a similar price. I’d be open to putting an 18 or 2 15s