most common for hub is 1, 6 & 11 so maybe try 3 or 8
you can try downloading istumbler if MAC and then run it. This will show the broadcasting networks round about you and their channels including your own. If you then enter your router and change your wireless channel to a free or less congested channel.
try a few channels and see if any helps istumbler will take the guesswork out of which channel as it will show networks round about you and their channel so you can then select a less congested channel or even a free channel
post back with update
that is best connection - the test socket
which channel are you using now?