PROAC D48R Bass Booming

Try this guide for speaker placement.

http://www.cardas.com/room_setup_calculators.php

Looking at reviews on your amp it was noticed the bass was good but not particularly tight. Combine that with speakers that arent really known for tight bass and that may be part of the reason. Another cheap thing to try would be a Schiit Loki EQ or something similar to shelve down the low bass a bit. I find it completely transparent. 130 bucks worth a try imo. 

*What we are not seeing is his room with a multiple of 2 and having full Range Speakers positioned in the corners is the challenge*.*Because of this (any full-range speaker) in the corner will be up 9 to 12 DB * because of the corners of the small room are near the speaker. Its not the speaker fault or amps (((extravaganza recommend amps which reproduce tight bass))) No leaner wire or amp will fix this magnitude of an issue. If amp manufacturer made an amp that its frequency response was down 9 to 12 DB at 80HZ that amp would be considered broken.
If bringing the speakers closer doesn’t solve. Vandersteen makes an analog nondigital assessment box start at 20k then 33k move up to 50 K and higher until the problem goes away finalize with the specific X2 High Pass 140 bucks
Schiit Loki EQ = 150 Bucks would also take down excessive 80 Hz bass.
Put Felt on the wood surface under the ports. once installed your in-room bass response will be more neutral try going back to where the speaker’s position sounds their best.
Best, JohnnyRAudio Connection

I whole heartedly thank all of you for your valuable guidance.  Apart from this problem, these speakers are sweet sweet sweet sounding .

Go to a home store and ask for some pipe insulation. Measure the opening at the bottom of your speaker (looks like four or five inches). They make pipe insulation out of foam rubber and many different sizes so get some big enough to block the bottom of your Proac. This will cost $10 - $15 dollars.