Default Support for Bluetooth Speakers


I saw a device is advertised as support bluetooth mobile phone. Will it be possible to pair it with a Bluetooth speakers? I am not familiar with Bluetooth. Is it a matter of hardware or software that decide what device it can pair with?

gTablet, DRH Jelly Bean 4.3
Kindle Fire HD 8.9, PAC-man
Moto X XT1058, AT&T 4.4
Samsung Galaxy S4 i337, AT&T, 4.3 rooted