Corner base trap- to the ceiling?

@ditusa Thanks for posting that Acoustic Fields video.  Makes you wonder what else we spend money on that has no real purpose.  Cheers.

I wouldn't place too much faith in Acoustic Fields. He is promoting his own solutions, and flies pretty far from a lot of the accepted acoustics theories with little in the way of real data. Having said that  corners are the most effective place to treat low frequency room modes, but it can take a lot of absorption to address modes below 100 Hz. If possible it is best to identify the modes you need to address, and use a combination of speaker placement, listener position, and room treatment to provide the smoothest possible low frequency response.

I wouldn't place too much faith in Acoustic Fields. He is promoting his own solutions, and flies pretty far from a lot of the accepted acoustics theories with little in the way of real data. Having said that  corners are the most effective place to treat low frequency room modes, but it can take a lot of absorption to address modes below 100 Hz. If possible it is best to identify the modes you need to address, and use a combination of speaker placement, listener position, and room treatment to provide the smoothest possible low frequency response. Multiple (2,3,4) subs can be effective in smoothing out response as well.

My room is on the smaller side and I have a floor to ceiling bass trap behind my speakers in a corner setup. 

If you are serious about it, all the way to the ceiling. Upper corners are just as important as lower corners.