Acoustic Guitar Amplifiers

Ok i just bought a K&K pickup for my acoustic and it sounds awesome, the only problem is i have a Marshall MG10 amp and it makes it sound horrible. It gives it a tone for the electric guitar, as it is made for an electric guitar. Does anyone know of an acoustic guitar amp which isn’t too pricey, but just amplifies the natural sound of the guitar itself?

Cheers,
James.