Latest EQ at listening position. I sort of went AstralStorm EQ bonkers on this. Actually, not that much. The dip at 78Hz is one of those annoying uncorrectable room effects. I left the treble after 5k completely alone. Because of the directional nature of the drivers used, the slope is less steep than I would usually have it.

I'm done with this project and very pleased with the results. Moving on to the next one when I have more time to spare.

Hopefully it's an intra-Japan price raise. If US prices stay the same, there's still an effect price increase since Japan is doing it's own quantitative easing right now with substantial effects on the value on the Yen.

I love when things I own become discontinued or unobtainium! Always seems to make them sound better.

Just wondering, how well do couches work as bass traps? Assuming it is against a wall of course.

I'm new here and just subscribed to see the pictures on this thread. Thanks to Marvey for your excellent write up - it is the best I've found on the BK-16.

In the next few months I'll be building a variant, the BK-161 which originally was designed for the FE168 Sigma but most often the FP163 was put into it. (similar to the BK-10 and BK-101 variants).

There is a German website (no affiliation with it, just an interest) that describes another form of a horn, basically a bass reflex with the port being a short horn. It goes lower in frequency and the horn is supposed only to work on the frequencies below the cutoff of the BR part. According to reports it works and it uses a shorter horn plus it uses drivers that are having a Qts of around 0.4 ~ 0.5.