not bad, the AmazonBasics tuts but also

I had wondered how great the difference between a 25 euro model and a twice as expensive model is.
Furthermore, the BTA what to expect increased quality transmission works with the aptX Bluetooth Technology.

I bought both devices on 11/11/2014.

I tested on a stereo: Sony MCR-640 without a subwoofer
An iPod Touch 4G was directly connected to the iPod dock
An HTC One Mini was operated via Bluetooth to the above Sony Bluetooth Adapter.

played music:
Evanescence: Hello, My Immortal
Rihanna - Diamonds
Lykke Li - I Follow Rivers
New Model Army - Family Life

To my surprise, I could not detect any significant difference in sound between the two receivers.
The BTA sounded> minimalZur crosscheck I had used ipod touch instead of an iPod Nano 4th and received the same recognition.
If you listen to his music again directly (without Bluetooth) on his stereo, it sounds a little better, but not much. A wireless connection is just no direct connection.

Another feature is noticed: At the end of the album included or a favorite list (ie, when the music ends), a 'click sound A star is "to be heard, which is, however, silent listening at the BTA deduction for both devices..

Topic scope: is both equally bad. No Difference. At 6-7 meters is the end and the music 'stuttering'.
But also that it is related how his Bluetooth device (transmitter), so his cellphone etc. holds in his hand, or
also how old or new the Bluetooth (transmission) device.
The iPod Touch 4G is much more unstable as the relatively new HTC One Mini. So if it stutters liegts not unbending on Bluetooth receiver but perhaps own transmitter.

Size comparison:
The Harman is still a bit small and maybe looks a little noble. But what the hell, beie devices are halfway inconspicuously somewhere on the cabinet. For the network connector is slightly larger at the Harman. The Harman has the light above the Amazon receiver front at the front side

Conclusion:
The APTX has not really convinced. The Amazon receiver is perfectly adequate and I would buy it again at any time. The Harman BTA receiver I have sent back.
And something to return: Have the BTA Saturday morning abandoned to 10am at the post office and on the same day at 16: 30h came from Amazon an email that the return has arrived (!).