hello, i am in europe and couldn't bring my m-audio speakers with me because they won't work with convertors or shape adapters on the end of the plug. i need new speakers. there is a music store here but they are $111 euro. so, i bought a pair of old speakers in a second hand shop for 10 euro today but they have the old stereo wire ends. my ? is.......can i attach the speaker wires to right and left 1/4" cables and then can i plug them into my presonus firebox? will this work safely?