Recent content by Volenti

Well, modeling this with a pair of DD1008's (I don't have the RE 8's on file, DD's should be pretty close) if you remove the compression chamber completely (you'll need to invert mount the subs) and increase the mouth size to about 2x driver SD (about 12'' wide on your plan) you'll get a more...

Heh, those enclosures didn't seem all that large untill you see them fill the back of that wagon, nice job.

If you make all the surfaces stiff enough (either through the use of braces or curves or shear material strength) so that the resonant frequancy of any one panel is higher than the highest frequency you intend to use the sub at then you shouldn't have any weird noises, and applies no matter what...

Other than looks, there's nothing wrong with positioning the port as you have illustrated. (been there, done that, doesn't matter)

Having that many 180 turns in the design is going to introduce resistive losses that could negatively effect the end result. A taller/longer design with only one or two 180 turns would perform more accuratly to the design and would allow the driver to fit more easily.

The bottom line on dacron (or anything else that provides resistive damping) is that it will reduce resonance, reducing resonance can make an enclosure sound better, but it will never, ever increase absolute output, you need to increase resonance if you want more output with the same driver and...

You still get "cabin gain" in a room bit it's not as dramatic and at a far lower frequency than in a car. Since you are looking at a design for home I suggest you check out this link http://www.diyaudio.com/forums/showthread.php?s=&threadid=97674 It's the "new hotness" when it comes to...

Extremely convoluted enclosures can cause a response other than predicted, but from what you describe it doesn't appear like yours will cause significant undesirable effects.

Well there's going to be a big difference between using fibreglass insulation as per manufacturers specs, and cramming in as much as you possibly can. The latter will provide a pretty good temporary seal. A more permament, and far messier solution would be expanding foam, which would be...

You're confusing flow with pressure, just because the area above the port has a low flow, doesn't mean it isn't being pressurized. Nature abhors a vacuum, areas of high pressure will flow to areas of low pressure given the chance, it is physically impossible, as in breaking the laws of physics...

First, don't use polyfill in an attempt to "make a box larger", it does effect the subs response, just not in the linear make-box-appear-x-larger way that enclosure guides say. Second, don't use polyfill in a ported enclosure unless it's just a thin layer attached to the walls, polyfill damps...

Im my opinion the DD 9510g is not suitable for bandpass at all, going by it's specifications, it's most happy in a horn (I've just finished a SPL horn for a 12'' with similar specs) and only barely passable in vented. This is a very clear example of "There is such a thing as too much motor...

The area above the port IS NOT DEAD SPACE, explain your reasoning, you know using science, that this volume of air is magically isolated from the rest of the enclosure volume.

First off, polyfill doesn't really effect T-lines like that, it will damp the line and this effects higher frequencies more than lower ones, so when you listen to the line before and after, the "after" sounds like it's going lower than the "before", when it's really just filtering out the higher...

The 7.75'' width is the line end, not an internal measurement, imagine the line as a straight tube that's 12'' high, the closed end where the subs are is 11.75'' wide, the open end is 7.75'' wide. Fold this up in your enclosure space, start at the port end, make it 7.75'' wide then increase the...