Bass reflex plug

I have great speakers in our small sleeping room (DK-SAT from Hifi-Selbstbau.de) but I had to place them much to close to the wall and as to be expected had to much bass. So I just made this plug to close the bass reflex opening.

Please use rubber bands or as I did cut a ballon in stripes and put it in. If your speakers are also close to the wall you will hear a better reproduction of lower frequencies and hopefully also more details in the upper frequencies.

Scale it as you need it. The o