Speakers for connecting to a microhone input under 2k

I just bought a mic and also ordered a 1/4 to 1/8 (3.5 mm) adapter to connect to speakers.

But I don't have speakers with aux-input (aux-in is required right?).

What is the best speakers i can get with aux input under 2k. I would really prefer portable speakers around 1k if any are available.

Please guys help me out.