[Hakka]

I have 2 DIY sonotube subs using 12 inch shiva drivers, 17.5hz tuning point. They are corner loaded (front corners) in a rectangular room (13ft x 10 ft x 8ft). EQ is a BFD1124P.

I took all my measurements from the right seat (my seat), measuring both subs together and EQing both subs together (in couple mode). When I was finished I measured the left seat and found an almost identical response.


The first graph shows the unEQ'd vs EQ'd.

The second graph shows both seating positions overlaid.

The third graph shows the left sub only, the right sub only, and both subs. This is an interesting graph as each sub on its own has an uneven response but when combined they measure flat.

You will notice the first graph shows a smoother response in the 100hz -150hz range than the other 2, I had already saved the other graphs when I tweaked this filter, so the curve in the 'before & after' graph is what I'm currently running.


I have extended the graphs down to 10hz, as there is quite a bit happening in that region. Who needs bass shakers when you have a 20db hump at 15hz?

All comments welcome.

Harry.