I've tried this with a Mac and PC's and the router always experiences packet loss and signal drops, from anything like streaming music to just web surfing. The signal holds for a few seconds and then interruptions.
I've upgraded to the latest firmware, reset to factory default, tried changing the channel, unpublish the SSID, allowing only the MAC address of the computers, default settings, WPA, basically every variation I can think of. This problem has happened at 2 places I've lived in. Now using Time Warner, freshly installed cable modem. Everything streams/works perfectly when connected via the Ethernet cable.
I enabled the debug logs and I constantly see variations of these Drop ___ packets.
Drop ICMP packet from WAN 63.131.143.179:11 74.73.x.x:0 Rule: Default deny
Drop TCP packet from WAN 66.220.145.39:80 74.73.x.x:60761 Rule: Default deny
Drop UDP packet from WAN 187.113.8.186:23812 74.73.x.x:45537 Rule: Default
Is it time to replace it?
This suggestion says to try a UPS, which is about the only thing I haven't done.
I guess I can also try lowering the MTU value
per this thread.