Streaming Music using Bose Speakers. (wired)?

I have a pair of bookshelf Bose Speakers ( more than 20 years old) but they work great. Currently they are attached to an amplifier that is hooked to my Samsung HD TV.

However, I would like to use these in my living room for live streaming, pandora, etc.

Meaning I would like to listen to audio from an Iphone using these wired speakers. I assume they need to connect to some type of auxilliary device.

I recall one of your store managers at a Bose store mentioned there's a device I can purchase from them that can hook up these wired speakers and connect via Iphone.

Any ideas for a solution?

Let me be bit more specific. I want to connect my Iphone to these speakers which are wired. What do I need to make this work. I'm sure I need a middle piece such as an Amp. I don't want to use my existing amp… As using it elsewhere and it is big and heavy.