The are usb speakers that require so much power that they only use the usb for data and they have a separate power source.no such thing
All USB devices are powered. It's USB.
USB is a digital signal. It needs to be translated to analog to drive a speaker, so you need a chip to do this.
The are usb speakers that require so much power that they only use the usb for data and they have a separate power source.
Of those that run off usb power, there are some that require a powered usb hub because the iPad doesn't deliver enough power via usb.
Finally, there are those that are able to run directly off the iPad. I'm interested in hearing which speakers fall into this category.
I'm interested in which unpowered USB speakers will work.