Fostex BK-20 Cabinet - Sold Flat - Each

Raw material prices for these flat packs is currently too high for us to offer them at a fair price. We will re-stock if/when lumber prices go down.

Folded Horn BK-20 Baltic Birch Cabinet - Pre-cut Wood for 8" Full Range Speaker

(Loudspeaker not included) (Here is a link to the kit with loudspeakers)

The wood pieces for the BK20 are all pre-cut and sold flat. The side walls have been grooved to make positioning and assembly easier. The Baltic Birch is 11/16" thick and doubled up for the front baffle per the Fostex cabinet plans.

The driver hole has been cut to 182mm (7.16") to accept most Fostex 8" full range speakers. The rear of the driver hole has been well chamfered to allow for optimal air flow. Feel free to try other 8" full range drivers in this cabinet. The maximum depth of driver this cabinet will accept depends on the magnet structure. The wall opposite the driver through hole is angled. It measures 127mm (5") from front baffle to back wall on the bottom of the hole, and 150mm (5.93") from front baffle to back wall on the top of the hole. You can always carve out some of the back wall or fabricate a spacer should your driver not quite fit. 

We recommend the Fostex FE206En full range speaker (shown in photo), but the cabinet will also work for the FE208E Sigma.

Please look at the BK-16 and BK-12m kits as an example of what this will look like finished.

You may also decide to add a super tweeter to your speaker. The Fostex T90A would be a good choice, it works very well in the BK-16 kit.

The rear panel is pre-cut for a perfect flush mount of the TD-CUP dual binding post input cup. This allows for the easy addition of a super tweeter.  Don't forget to order these with your cabinets from the drop down menu unless you have other plans for that opening. 

Assembly instructions are included. Wood glue and clamps are recommended for assembly.

After assembly, you may wish to round off the corners, stain, clear coat, or paint the cabinet.