Clients often ask if 3rd party components such as a CD player, phonograph, or cable box can be added to their Bose Soundtouch system. The answer is yes. If you want to add an additional component for a single zone, simply connect the audio output of the component to the aux input of the Soundtouch device such as a Soundtouch 20 or SA-5 amplifier. Please note that you will need to manually start the device, the Bose Soundtouch app will not control the device. Once the device is playing, simply select aux in the Bose app as the source. If you want to add a component to multiple zones, you will need to connect the audio output of the component to each of the aux inputs of your Soundtouch devices. A small A/V distribution amp is recommended if you are connecting multiple Bose Soundtouch devices.