The Echo Input ($35) is the cheapest way to turn any speaker, so long as it has Bluetooth or an aux connection, into an Alexa-enabled smart speaker. It allows the speaker to function exactly the same as Echo — it can play music, set alarms and timers, answer questions, control your smart home — and you can control it with your voice. When you boil it down, the Echo Input is the same as Echo Dot ($50), just without the speaker. The idea is that with this little gadget, you can get more out of the speakers you already own.
The Good: The Echo Input is cheap. And setting it up is easy; the Alexa app walks you right through the whole thing. It works with any Bluetooth speaker or speaker with an aux port, meaning you can connect to nice powered speakers, like a Devialet Phantom or KEF LSX, or the cheap UE Boom or Bose speaker that you bought years ago. You can hook it up to amplifiers and receivers, too, and therefore control larger systems. After its setup, the connected speaker can be then integrated into a multi-room system with other Alexa-enabled speakers. There’s a mute button so, just like with an Echo and Echo Dot, you can stop Alexa from listening whenever you like.
Who It’s For: Anybody who has existing speakers and wants to interact with them like an Amazon Echo, or integrate them in a larger multi-room setup.
Chase PellerinWatch Out For: The Echo Input is a versatile little gadget but it’s ultimately dependent on the source it’s connected to; if the speaker or receiver is turned off or in a power-saving mode, the Echo Input won’t work until the source is turned on or woken up again. The Echo Input isn’t designed for hi-fi streaming, so even though it’ll work with hi-fi systems, the audio quality won’t be the best. (Amazon released the Echo Link ($200) for hi-fi streaming in December.) The Echo Input is a powered device, so it’s going to take up an extra wall outlet. Also, dealing with the Alexa app and enabling smart skills can prove a tedious task.
Alternatives: Amazon’s Echo Dot can much do the same thing as the Echo Input, but it’s a little more expensive because it also works as its own speaker. A Chromecast Audio is a good alternative for those in Google’s ecosystem, although that streaming puck lacks a voice assistant.

