Sonos Connect (nb not the new or old *Connect AMP* ) and a NAS is the right answer here.
The Sonos gives an analogue or digital output that goes into your existing amp setup. It can access all your files that are on your NAS and play them through your hifi.
Your iPhone can also then play from the NAS.
One downside to this setup is that you won't easily be able to access your music library when out of the house. You may be able to buy a NAS that makes this easier.
Some routers allow you to plug the hardrive directly into them and have it always available on your home network. They tend not to be the most powerful option but are essentially free.
Sonos Connect (nb not the new or old *Connect AMP* ) and a NAS is the right answer here.
The Sonos gives an analogue or digital output that goes into your existing amp setup. It can access all your files that are on your NAS and play them through your hifi.
Your iPhone can also then play from the NAS.
One downside to this setup is that you won't easily be able to access your music library when out of the house. You may be able to buy a NAS that makes this easier.
Some routers allow you to plug the hardrive directly into them and have it always available on your home network. They tend not to be the most powerful option but are essentially free.