Hi, I want to renew the old mini stereo from a house I rent by days for tourists and I thought thst just providing usb speakers for the guests' cellphones would be a better idea. My problem is that most things I find feel a little gimmicky or designed for a different purpose (portability), so I could use some recommendations. What I'm looking for: usb speakers which work for both android and iphone, compatible with apps like spotify and such (so not an mp3 player but speakers for the phone) not a fan of bluetooth, but as far as there is a cabled option, I'm fine with it. Portability is not a concern, so I prefer quality and power over small size. Should the system have a battery (not a concern neither, i prefer cabled), the option to just plug it to an appliance wgen there is no battery should be there. An fm radio for guests who dont have a cellphone would be a nice inclussion. What would you recommend for this? Speakers? Just a cellphone compatible mini stereo? Any models in particular? Thanks in advance.