greetings and salutations,

i have finally gotten my empeg installed in my honda and it is connected to the aux-in on my alpine head unit. the probelm is that there is a hissing noise (just like when listening to good old-fashioned cassette tapes) coming from the empeg's output to the alpine. it can be heard (more) during silence or regular volumes. it isn't really terrible but wanted to know if this is common. do you think better rca's will work?