New MBP owner here, my setup includes a 27" cinema display, a numeric keyboard hooked up through the monitor, and I also use an Apogee ONE interface. Today, I had the APogee hooked up through the USB port on the keyboard (So thats MBP==>Monitor==>Keyboard==>Apogee). I noticed right away static and crackling when listening to headphones through the Apogee. Plugging it straight into the MBP made it all go away. Then, I plugged an external harddrive into the keyboard as well, so thats MBP==>Monitor==>Keyboard==>HDD, and I got an error saying insufficient power was available so one of my USB devices were being shut down. Now, it seems obvious, but is this a common thing that you can't have too many USB devices connected, or is the issue more with daisy chaining them? It would be nice to not have to worry about it because between the monitor and MBP, thats only 4 available USB ports if I dont include the 2 on the keyboard which seem useless. Just curious if others have experienced this. Thanks!