In the end I got an E2 to use with my PC. You have to install a Meridian USB driver on the PC. I was told by my dealer that there is no such driver for an iPhone or iPad so it won't work. As for using it in your car, I'm not sure but would there be a way to install the Meridian USB driver into your car system?

MD600(2x2TB); iPad Pro
LR. 818v3, 8000SE
HT. 861v8+ID41,HD621; BW 2x802D,HTM1D,4x804S;SVS sub; Mac 5 MC501s; RGP 600Pro, JVC X950; Radiance Pro; Oppo 203
FR. G65, DSP3200-3300 DSW, HD621; Mac MC152; Oppo 103, PDP TCP65VT60, Radiance 2124; RGP1200C
4. G65, DSP3200-3300,HD621; OPPO 83, Radiance XE PDP
5. 818v3; Prime HP Amp; HD800