Maxim's Application Note or Reference design describes a stereo audio system for external use with 20 W rms power supply that can be controlled by devices that have the wireless feature including the Apple iPod.
In figure 2 we have the basic diagram of the system with the amplifier used.
Figure 2 - MAX98400A class D amplifier used in the design.
In the original design the audio signals are obtained from an adaptation made on a Nokia Headset, with all the details provided. For readers wishing to know more, the Maxim document in English is at:
http://pdfserv.maximintegrated.com/en/an/REFD5147.pdf
