How to get Bookshelf Speakers with single input to work with multiple inputs.

[Thomas_171]

I was looking into getting the Roth Audio OLI RA1 2 Way Pair Of Bookshelf Design Speakers which have a single input on the back (banana cable). I want to put my computer Xbox One S and Amazon Echo Dot all through these speakers without having it go to the hassle of changing audio inputs manually. As they are passive I would also require an amplifier to power them (LEPY 2024A Plus Amplifier). Not only am I slightly confused about how to actually wire up the speakers correctly but also if I would even be able to connect three devices to them. From my reading I have found that it may be possible through the use of a mixer but I am still unsure.
Any help would be much appreciated.
Questions:
Which wires would I require?
What additional hardware do I require to achieve this?

 

[americanaudiophile]

You don't need a mixer unless you want to listen to more than one source at the same time.
All you need is an integrated amplifier with at least three inputs.
https/www.amazon.com/Technical-Pro-IA1000U/dp/B00J2GB368/ref=pd_cp_23_1?_encoding=UTF8&pd_rd_i=B00J2GB368&pd_rd_r=QT470JVBA7ZQTAZNF1QF&pd_rd_w=oEMt2&pd_rd_wg=oLSnv&psc=1&refRID=QT470JVBA7ZQTAZNF1QF
Or you could add an input selector to any amp.
https/www.amazon.com/Fosmon-A1602-Splitter-Connecting-Devices/dp/B00HNCPR92/ref=sr_1_7?ie=UTF8&qid=1506625358&sr=8-7&keywords=stereo+input+selector
https/www.amazon.com/Source-Tabletop-Control-Switch-Internal/dp/B0056DQT1A/ref=sr_1_1?ie=UTF8&qid=1506625357&sr=8-1&keywords=stereo+input+selector
You will need a stereo cable for each source. Probably 2 RCA plugs at the amp end. The connector at the source end will vary depending on the source. No additional hardware unless you can't get analog audio from a source.
To get the best sound quality a used integrated amp or receiver will give you the best bang for the buck. More power and better sound. The little digital amps and cheapo integrated amps (like the one I link to) usually have over rated power specs and don't sound great. Older Marantz AV receivers without HDMI are cheap and sound good for the price.