I use the CCK (iPad camera connection kit) supplied by apple. This enables USB input to any iPad and usually bypasses the DAC in the iPad (but not always for some reason?). In the case of the WA7 it does, confirmed by Jack. For an iPhone I haven't tried, I can try tonight but I immediately assume you would more likely use an RCA to LOD. There are nice silver RCA to LODs on eBay for $50-$60!!!! If like me you prefer copper they are there too. If you want something extra nerdy try toxic cables or ALO.