hiseoxv

I bought sonic port through amazon and received last Tuesday. But, there is problem in sound quality. When sonic port is connected by only earphone (Apple ear-pod) and iPhone 5 and then I start jam up pro or mobile pod, i can here white noise through earphone. Actually, It doesn't disturb guitar playing but I doubt greatly whether it is defective product. Please tell me about your sonic port in this case... T_T