Dayton DA270 vented box volume

[morris]

With Jeff's Box Modeler I have been trying to determine the smallest box I can use with this woofer for a bookshelf 3-way design. It will be used mainly for music and I trying to get an f3 of around 40 hz. I used the DA270 because I think that larger woofers sound better in the bass department and it should give me the impact that I am looking for. No replacement for displacement they say.

With 50 liters vented with a 3" diameter port tuned at around 23 hz and with 50 watts input the woofer can reach 104 decibels and would be at 6.0 mm xmax. Woofer Xmax according to PE's website is 6.1. Seems like it would work for what I intend to use it for...but what do I know since I am really always be a newbie in this hobby.
What do you guys think of the alignment?

Ps. This woofer cones are SHIINYYYY!!

[JasonP]

Box is really, really, quite smaller than it should be. I fired this up in Unibox and gave it a whirl. Try the same Fb and port radius in a 90 liter and see what I mean. The small box size is sapping a lot of the possible low end output. Now, at 50W in 90L its going 1.5 mm past xmax (all the way down to 20, nice!), but it seems to have a bumped back plate so I doubt that is going to bottom out the driver. Maybe someone that has used this series could correct me if I'm wrong here.

[morris]

I know that my box is undersized and as a result the woofer's ability to play low is "zapped" but It is a compromise in my part to increase power handling and reduce cabinet size. For music an F3 of 40 hz, IMO, is enough for me and the gradual slope is my attempt to emulate a sealed response for the woofer. The low tuned vent is there to hopefully assist with the bass. Of course my reasoning could be mistaken. IF I am headed in the wrong direction kindly let me know.

[JasonP]

Ok, just making sure that was a known design trade-off, rock on!

[Chris Roemer]

I know that my box is undersized and as a result the woofer's ability to play low is "zapped" but It is a compromise in my part to increase power handling and reduce cabinet size. For music an F3 of 40 hz, IMO, is enough for me and the gradual slope is my attempt to emulate a sealed response for the woofer. The low tuned vent is there to hopefully assist with the bass. Of course my reasoning could be mistaken. IF I am headed in the wrong direction kindly let me know.

I only see 4mm.
Personally, I'd step down one driver size if I needed a box that small.