How to drive a pair of speaker


I have a pair of the speaker (4 line cable).But the amplifier is broken.
So, I am finding a new amplifier to drive the speaker. The spec for my speaker is 4ohm and 15w.
I just see a project on Kickstarter, it is a Bluetooth amplifier with magnetic plug connection.
It seems not bad. May I ask this Bluetooth amplifier is it suitable for me?

https://www.kickstarter.com/projects/1195953146/era-any-speaker-is-bluetoothable-in-a-second?ref=user_menu

linchk04