I know the subject of bracing has been talked about many times, but have a few questions in order to understand the basic concepts.
1) I have learned that bracing a sub-woofer box as the effect of raising the cabinet’s resonant frequency. My understanding is this will move unwanted sound due to vibration above the sub’s passband. In addition this will also make it difficult for the sub to vibrate the box because the resonant frequency will be above what the sub’s driver can produce. If true, won’t this simply add unwanted color higher up the range and interfere with the main speakers’ passband?
2) When I wrap on a speaker box, is the sound that I am hearing the panel vibrating at its resonate frequency?
3) Lastly, the attached picture is similar to the type of bracing I would like to use in a small sub cabinet I am building. Is there anything particular wrong with it?