\rHi Ashish:
According to this link they say the AMAZON Echo does have an internal Bluetooth Transmitter built-in and you can command to connect to Bluetooth which then disables the internal speaker:
http://www.aftvnews.com/the-amazon-echo-dot-is-more-versatile-with-bluetooth-speakers-than-wired-speakers:
An external speaker connection can be achieved wirelessly via Bluetooth or wired through the 3.5mm audio jack on the back of the device. The issue around using the 3.5mm jack is that, when a 3.5mm cable is connected to the Echo Dot, the internal speaker is completely bypassed, whether or not your wired speakers are turned on. This means that, when using a wired connection, your wired speakers must be turned on if you ever want to use the Echo Dot. On the other hand, with Bluetooth speakers, the Echo Dot switches back to its internal speakers when the Bluetooth speakers are turned off. Even if the Bluetooth speakers are on, you have the flexibility to sever the connection hands-free by simply asking Alexa, so you can switch back to the internal speaker at will. If you have your heart set on using wired speakers with the Echo Dot, there are things you can do to make wired speakers a lot more convenient.
So you can use the AMAZON ALEXA connection to broadcast the audio signal via Bluetooth to any of our Bluetooth enabled speakers including broadcasting to our NERO XS integrated amplifier with built-in Bluetooth Receiver.
TL/5223\r