I've been experimenting with the AEBS settings (Wireless->Radio Mode->, also Wireless Network Options->Multi-cast rate andUse Interference Robustness), even relocating the AE closer (10'-20') to the SBT and for the most part no significant change in it's signal strength (avg. 50-60%+). Then after setting the AEBS back to 802.11n only (2.4GHz), Multicast Rate at 6 Mbs, and using Interference Robustness, and restarting the other AEBS and AE the SBT signal strength suddenly shows 90-100%. But after I start playing music it goes right back to constantly re-buffering. This SBT as a wireless music server is useless. At least in my situation. Why the SBT can't stream direct from my iMac makes no sense when it has Airport. I'm assuming it is going through the wireless network from the AEBS, then to my iMac, and back.