The Bose Rear Surround speakers were designed to work with our SoundTouch 300, Soundbar 500, and Soundbar 700 systems as they use a proprietary wireless connection for the soundbars.
If you have you're music downloaded in say iTunes or Windows Media Player, you can download the SoundTouch app from our website and then sync your library in the app on the desktop. From here, you can access the whole library from your iPhone as long as the computer is running.
The other option here is to connect to the speaker via Bluetooth from the iPhone. At this point, any app that has audio will now be streamed to the Wave Soundtouch IV system.