Hi, i was thinking about buying these speakers for my bedroom. They have the Spring Loaded Terminals with the red and black ports. I dont want to buy a reciever but ive read the reviews and watched some youtube videos and i really want to try them out. Is there any way i can use these with out a reciever. If not, can you point me towards a cheap reciever. (i will be using it for ipod use only with an ipod universal dock.) Thank you so much.