DIY acoustic panels?

I am not sure about the bass traps. They might be overkill for the stage I am at.

i have been looking at the new PB Ultra subwoofers from SV Sound, however, and they claim dual subs can help smooth out the bass frequency  responses.

https://www.svsound.com/pages/16-ultra-series
https://m.youtube.com/watch?v=OXVpy5jaNsk

I did a little research and found a site that tells you how to build acoustic panels:

http://acousticsfreq.com/how-to-build-your-own-acoustic-panels/

Apparently, fiberglass board insulation at least two inches thick is needed. The sample construction uses 2″ Roxul RHT 80 at $0.78 per square foot.

As far as decorative fabric, anything that is acoustically transparent, where the sound can reach the fiberglass. The page suggests putting the fabric up to your mouth and blowing through it to see if air freely flows through it — so I guess the lighter the better.

I know someone who can probably make them look like amazing art work.

I will be combining my audio and video equipment, which means a large TV on the wall behind the stereo equipment. Will the glass on the TV affect the audio? If so, should I build panels to cover the TV?