5/8 mdf

 

The box is around .54 cubic feet after displacements.

The port looks like a 2" diameter port.

Around 54hz tuning. Too high of a tune for most music.

Extend the port length to about 8" to get around a 40hz tune. Will play much lower without distortion. Make sure the subsonic filter is enabled on the amplifier.

 

thanks for the info! Seeing that the box is 10'' deep, wouldn't a 8'' port be too long?

 

And as for your crossover settings - a gap from 80 to 120hz is nothing. You won't ever hear it.

 

So it's safe to say that setting the sub x-over to cut at 80 is better than 120? What negative factors are accociated with having the sub play frequencies higher that 80...up to 120?

Subsonic filter is 15Hz fixed.

 

Well it's said the minimum clearance wall to port is half the diameter, so 10-1.33 for the wood thickness leaves you with 8.66. Perhaps make the port 7.5" just to be safe, or have it stick out of the box a little. Regardless it should be a big improvement on the low notes over the 4" port.

 

Just listen to it as you adjust it. Not always, but often a crossover point that high makes the sub sound boomy and hollow.

 

this is what i will try
-install a longer port
-cut off at 80hz
-change slope from 6 to 18

one last question, seeing that i can change the slope on my HU, should I dial the Bass EQ on my amp to flat? it is presently set to 6?

 

The Bass Eq on my amp goes from 0dB(far left), +6dB(center), +12dB(far right)

 

Anyone want to help me out RE Bass EQ?