What is the best way to make a bluetooth connection to a sound amplifier?

Question

Do it yourself

In general, there is UMZCH, sometimes it is more convenient to connect via bluetooth than wires.
There are a bunch of separate BT modules on the Internet, with different functionality and price. But even some of the cheapest ones cost about $6-8.
There are also many wireless earphones with great functionality, but with the same price of $6-8. That is, it turns out to be more profitable.
What is better to choose? The criteria are as follows:
1. Not too high a price, $15 maximum.
2. Without any complicated settings, just plug it in and it works.
3. More or less normal sound, without strong distortion, noise, squeak and other things.
Well, sobsno and all.

Answer 1

It is better for this purpose to buy an FM tuner for the car, of which there are now in bulk. And they learned how to do it well. Although it will cost not 15 bucks, of course.
The BT-module, in theory, should be better than headphones in terms of quality, but, as I understand it, we are talking only about transmitters, without any strapping, because I haven’t seen any ready-made modules for 6-8, so I think that the result will greatly depend on the directness of your hands.

Answer 2

And what BT-modules do not suit? A very good option - he himself used several different ones, quite nothing in terms of quality and ease of installation.
PS options: www.dx.com/s/bluetooth+receiver