This weekend did not bring something exciting, but still there are some things done.

First, to get the middle ground point in the +/-20V DC source I tried to replace resistor voltage divider with the capacitor one. I would not say it worked, since quickly after the start positive shoulder of the divider jumped rougly to the +30..32 V DC (from +20) and negative dropped by the same bias. Which likely moved lm3886 amplifier out of its voltage range and it did not open. Do not really know why that happend, but apparently using passive dividers is not appropriate way to create the differential signal for the operational amplifier, and there should be some kind of a feedback (to the input transistor for example) to prevent voltage draw from the middle point.

Second, I made two crossovers for the speakers being built.

Loudspeaker crossovers

I but did not test them yet, since there are no cabinets for the speakers themself. And here we come to the last, but not least, thing I spent my time on. Actually I devoted most of the weekend to this.

Loudspeaker cabinets

Plastered, polished, mordanted, varnished, so far with the first layer, it will dry couple of days, and tried to make a photo, which I did not succeed though: was not able to move things around or change the light (cabinets are close to black actually) so that not to make the varnish layer dirty.
I think it will be not bad, we will see (and listen of course, that's the main goal).