The bass units are ready and playing. The Kairos alone are very good but together with the bass it opens up another dimension.
The volume of the box is just above 50 liters. I kept the frontal area as small as possible and extended the dept instead. The vents are tuned to just below 25Hz ,(Wo24 fs 24,5Hz) with the help of ARTA.
The bass is clear and has a nice punch. So thank you Jeff for a very good construction. I am very pleased with the result.
Next step is TW29-BN.