Whats the significance of my error?

[waltham415 0]

Hey everyone, So I finally started building my first box that will hold two 2 10" DCONs Everything looked good as I thought I could achieve 2.5 cuft with some 44in of port at 11"x4"...... Well now that I have all the walls in, I have begun to realize just how new at this woodworking stuff I am. I can't post any pictures now so I'll try to explain this as best I can.

Mistake 1: I have the port coming in on the left side, going in some 22 inches, then turning and following the back wall the last 22 inches. I planned on having 4 inches of width throughout the port but thanks to my amazing tablesaw abilities, I have 4 inches on that initial run, and only 3.75inches for the second half along the back wall.

Mistake 2: looking at the second half of the port along the back wall, the wood for the port stops about 4 inches (exactly 4 inches) from the right-hand wall. I'm no expert but it would appear to me that this would make the right hand wall become part of the port, stretching it's effective length and extra 4 inches (2 more along the back wall and the new 2 following the right wall)...

So now I sit looking at a net 2.6 cuft box (I still need to BS some .1cuft of bracing) with an port consisting of two seperate widths and an extra 4 inches. If I average the port widths AND factor in 49 inches of port AND find a way to shove .1cuft of bracing in (didn't realize how much that was) I sit with a box bairly reaching the 29hz tuning as appose to the 31 my calculations brought me and the 32 I first strove towards.

I plugged all of this into WINISD and discovered that a 2.5cuft box tunned to 29 hz has a 1.5db drop from 30-60hz when compared to the origional 32hz. I remember hearing that a 3db change in sound was hardly noticable to most people. So after all of that (sorry for the essay) I have this question: Despite all of my screwups... will any of these changes really be noticable to a noob like myself? Should I continue with the box as is? I want more of a SQ focused system so maybe a low tuning would be good.....

Any thoughts, ideas, or critisisms are greatly appreciated

Thanks in advance

Alex

[Sencheezy 689]

<------- This guy needs pretty pictures

I never grabbed those novels in grade school, only captain underpants

[Duran 387]

Try it, that 1.5 decibel drop may not apply in real life, remember you will have a vehicle resonance in the mid to upper 40's region.

[waltham415 0]

Try it, that 1.5 decibel drop may not apply in real life, remember you will have a vehicle resonance in the mid to upper 40's region.

Good point. I'll give it a go. any advise on how to accomplish that .1cuft of bracing? If I end up just stacking wood inside, will it degrade sound in any way?

[Duran 387]

Place the wood in the corner(s) away from the port as to not impede airflow.

[waltham415 0]

Alright, sounds good. I'll be ordering the DCON's later today! anyone know of any coupons?

Thanks for all the help, I'm sure I'll be back with more questions sooner than later.

Alex