Answer 2: Enamel is the hard material that coats your teeth, and is made mostly of a mineral. However, we call other things enamel. There's enamel paint, which is totally different, and there's also porcelain enamel, which is used to make a lot of dishes.
All of this is due to Amazon's unique approach with the Echo. It's not a portable speaker like we've seen from Jambox and Logitech. Instead, it's a rather large, cylindrical device that needs to be plugged into power. It's something you'll likely just leave in a single spot in your home.
Answer Wiki. The Amazon Echo Dot has a 3.5mm line out so if you have an older set of speakers or stereo system you may want to get a 3.5mm to RCA cable (or others, depending on your speakers). You can also connect Bluetooth speakers or systems to the Echo Dot. If I misunderstood your question and you have passive speakers, you will need an amplifier before you can connect your speakers with the Echo Dot, as the 3.5mm line out requires active speakers.