You mean Poly+mojo+MicroSD+ PHONE............if you are going to play off just sd, why don't you just get a wm1a and be done with it? It is generally accepted that it performs at a higher level than the mojo........and also has 128 gigs of internal memory and you can add 256gb. Also has 33 hours of battery life compared to like 7 hours....., is built like a tank, and is much easier to use and carry? I don't get how anyone could justify the poly outside of its wireless capability as a streamer, which can be solved really with a raspbery pi3 for much cheaper....... also with a purchase of a mojo + poly, its the same cost? Also you can use your phone to stream tidal directly connected(oh wait nvm...rf interference...still needs wifi). If people are so keen on using the mojo solely as a desktop dac, which many people are, with the cost of the Poly, you can stretch and grab a Schiit gungnir or chord 2qute, or even a used chord hugo(if you are keen on upgrading that path).
The problem with poly is that, while it is flexible, it doesn't do excel at doing anything better for the price that its asked. Poly doesn't make mojo dac any better..same performance, if you are streaming at home...cheap raspberry pi3 does the job, If you want to use it on the go.....not great battery life and bulky.....Sony wm1a does it better.......
as for phil w's comment....I don't see why that's awesome? you have your phone, you have mojo and poly in one pocket, but your iem cable is still dangling out of the pocket or wherever you put it. and then you have to use your phone in wifi to control the mojo........I would rather have a dap i just pull out and switch and do everything. Better yet a dap that has physical buttons on the side like sony on the side so I don't have to take it out of my pocket. Thats not to mention....how warm the mojo/poly will get...><
Apple was genius not because of its Great great innovativeness but its ability to bring features that were useful, easy to use, and simple.
I can't believe stacking a phone with a mojo is easier than setting your whole poly up, getting app on the phone. Turn Poly mojo on, plug headphones in, put in pocket....iem cable dangling, turn wifi on, find your favorite wifi app. then use your phone everytime you want to switch track and volume, to do so, you have to turn on phone, access app....do what you want....also less battery life for your already short lived battery phones(meaning charge everyday).............like how can anyone say that's innovative use of mobile listening.
If its completely wireless yes, but its a mix of wireless and WIRed with the iem or headphone...I don't know how people think its totally wireless operation with music magically coming to your ears while the block stays in bag and you just use the phone.....