Coax & DBR

[Thorsolar]

Hallo,
I´m new in this Forum and I plan to construct a new speaker project. I plan a coax two way speaker in a double bass reflex cabinet like Fostex use them or Kondo´s DBR for the Diatone 610.
But I found very little information about calculate DBR systems.
The speaker I will use will be Beyma or B&C, but I´m open for other driver.

[fwater]

http://www.diysubwoofers.org/prt/dual_chamber.htm

and

http://www.claudionegro.com/

are two good places to read through. The point of interest at the second site is under projects / speakers / DCR.

A word of caution- if the enclosure that you're going to build involves small chambers and log vents (low tuning in a small box), I would take a pass and go with something more conventional. I did a DCR that way and with the amount of variables & unknowns, especially friction with three vents, I could have built it four times over before getting it right. This is only my experience, though...

[Thorsolar]

I thought in a DBR like Fostex or Diatone 610 by Kondo with 2 ports. I can´t find any calculation for it.

Regards
Thorsolar

[Cal Weldon]

Moved to Loudspeakers.

[Ron E]

The fostex boxes are referred to as Box in a box BIB on this forum. Do some searches.

I don't believe these work any better than a regular vented box.