sub design

I'm looking for some good small subs (around 20-40 liters) I’ve found a 26-liter subwoofer, the Buchardt Sub 10, which outperforms the 42-liter Kali WS-6.2. According to the data on Buchardt’s official website, the Sub 10 can reach 94 dB at 20 Hz.But kali can only reach 96 DB at 25 Hz. It is...

Hello! Im a new builder so the plan is a simple build inspired by BTS Ported Single Sub box Inspiration Box here 72X28X17 https://shop.gsgad.com/collections/behind-the-screen-bts-subwoofers I would like to make something similar. However no grooves and interlocking peices. Just woodglue and...