Bluetooth Speaker Build HELP

[MGreen]

I need to power one Technics Model SB-CS50 speaker. I plan to put an amp inside and connect a bluetooth device so I can create a bluetooth speaker. 

 

What amp will be small and powerful enough to power these???

I want both channels to run through the speaker in mono too! So the amp will have to allow that  

 

On the back of the speakers it says:

Impedance 8Ω

Input - 120W

Music 60W

 

Any suggestions for an amp would be nice!