Bose 901 series with and ipod.

What electronics are you driving the 901s with?

You should pay no attention to @hilde45 and @fuzztone . Both are typical audiophile snobs!!

@yogiboy LOL! I can't resist a good joke, especially involving (a) Bose and (b) a sledgehammer. OP, please do ignore me, though I am only half  jesting.

The OP asked about BT in his original post.

I am assuming the iPod in question does Bluetooth.  If it doesn’t, then I don’t think you can use it as a source.  If it does Bluetooth then you need amplification and a Bluetooth receiver.  A basic integrated amp that doesn’t have a DAC will keep it simple.  For Bluetooth receiver I recommend the Audioengine, probably the B1.  This will connect the amp by RCA connection, and the amp needs to be wired to the Bose speakers.  The Audioengine Bluetooth DAC/receiver can also be used with your phone as a source, so if the iPod doesn’t do Bluetooth, or if it dies on you in the near future, you can play the same music from your phone.

  It may actually be more economical and probably sound better to purchase Audioengine speakers, or another company that offers comparable products.  These speakers contain the amplification and the Bluetooth receiver.  All you need to do is pair your iPod or other mobile device 

  As you may have surmised, Bose has a bad name amongst Audiophiles, and invoking it on a site like this invites ridicule.