So I just pulled out some speakers out of storage and I'm having trouble getting them to work with my iPhone/laptop.

There are...
2 Yamaha s4|| 5H|||
Pioneer stereo receiver SX-2600
Kustom head 11-B
Kustom 1-15 B
Fender Princeton 65 DSP
Silvertone SMART 3s

I need help on what I'm missing to make this work, because whatever I try either doesn't work or makes inaudible garbage.