
Behind the preamp and driver section is plenty of room to install reverb- and spring-echo circuits if I want to.

The speaker cabinet is shaping up in my garage. It is built out of pieces cut out of 21 mm. thick plywood of spruce. It is not just a simple box with an open back, It is not an airtight compression box either. It is provided by internal ducts arranged to improve the respons in the bass region. I will not reveal more until I have tuned and tweaked it. The process reminds me of tuning an accoustic guitar. In the end I may fail and then I just convert it to a traditional open (or closed...) box.