Only the iPad is able to use an external DAC at will with the Camera Connection Kit. Other iDevices require a special "Apple certified" DAC....and those are mighty expensive.
You can use an external amp with any iDevice as long as you:
- Have a non-jailbroken iDevice
- Use a "Line-Out Dock" connector such as the FiiO L9
Is there any other cheaper way to bypass the internal DAC of iDevices yet to have portability ?
I don't mind to use power bank or battery pack.