Box is completed. Need it painted now. Also need some fabric for the grilles, they are completed as well, both of them. I've just build the one sub at first, second to follow in a week or so.

I'm gonna post a few more pictures, but my camera isn't really cooperating with my new laptop!

A quick question:
With these enclosure dimensions: ~180 liters = ~ 6.35 cubic feet minus internal bracing which i calculated to be around 6 liters (0.21 cubic feet).

So net internal volume before the driver is ~ 174 liters = ~ 6.15 cubic feet

EDIT: found a post on AVS forum, the driver takes up ~ 0.2 cubic feetså net volume is then 5.95^feet

**How much does the driver displace inside the enclosure?**
And so here is the real question:

With the net volume given, how much polyfill do I need?

And: is this the right polyfill stuff?

http://www.hoejttalerbutikken.dk/product.asp?product=566 (sorry danish site, but you can see the picture and click to enlarge)

My own thoughts on polyfill: I need to raise the perceived volume to around 200 liters to get a QTC of desired 0.7, so I need enough polyfill to gain around 26 liters + whatever the driver displaces. Far off??

Reading off the net I found this rule of thumb: no more than 1 pound of filling / cubic feet enclosure if the enclosure is larger than 3^feet.

Regards

claus linde