inputs.text: need use ipod amp - used use headphone jack ipod 5th gen connect fiio e12 amp simultaneously using 2 volume controls one ipod one e12 clearly degrades sound quality since getting l9 unmistakable distinct improvehement purity sound getting headphones yuin pk1 sennheiser hd 598 not talking subtle difference trust need one otherwise no idea whatsoever good ipod setup sound easily best 10 investment ever made portable setup