I think there are a number of high end portable players out there that will do the Diana justice. Their promo photos show it running off a Sony player. I was running mine off the old Lotoo PAW Gold (which has now been replaced by the touch). Maybe if you are looking at getting a Diana, you will need to spend more than $200 on a dac/amp dongle for your iphone to power it properly? Can't say I have tried dragonfly red though... If you want it to be portable portable, it may not be the correct choice as it is open backed.