. For a higher quality, the echo link can connect. Although, the sound from the echo dot (4th gen) is a little clearer than the echo dot (3rd gen). from venturebeat.com For example, the sonos one , which is arguably one of the best smart speakers on the market, can integrate with alexa seamlessly and costs upwards of $180 depending on the specific model you choose. Although, the sound from the echo dot (4th gen) is a little clearer than the echo dot (3rd gen). I also connect the echo dot with the line in and it can now play amazon hd music and stream radio station.