If you normally listen 3 meters away from your speakers, then shortening the distance to 2 meters will increase the SPL by 3.5 dB. It's not what you're asking for, but it does the same thing.
You must have a verified phone number and physical address in order to post in the Audiogon Forums. Please return to Audiogon.com and complete this step. If you have any questions please contact Support.