I want to know whether or not I can plug my iPod/iPhone into my Vox AC15CC? I have a male-to-male audio cable (small jacks) and also a Sennheiser 1/4" jack adapter. Will I damage either gear? Do I need a DI or something before the iPod? I've never thought about it before but I guess it could help "break in the speaker" (and give me some easy listening tonight!)