Hi sporx73,
Thanks for your post! You can connect your iPhone to the AUX input on the back of the Wave Music System IV by using a 3.5mm audio cable.
Let us know if you have any further questions!
Best regards,
Brian
Hello sporx73,
The Auxiliary cable can be purchased online or at your local electronics store. It is also known as a 3.5mm to 3.5mm audio cable.
Thank you,
Joel