ANT-208, HD-RX8, replace tuner, etc. Is there a solution to improve radio signal ?

Hi there,

I know there is already some posts relating issues like that, but most of them are dead and without a clear answer.

I actually own a Joying JY-UQ130 (RK3188 headunit). This HU is installed on a Honda Civic 9G (European model). This car have an amplified antenna which worked very well with OEM radio.

Since I installed my HU, radio signal / reception is not really good.
It was really good before, using my OEM radio, so it's clearly related to my HU tuner.

I tried ANT-208 amplifier but this product is pure **** (signal is worst than before using this) :
http://ift.tt/1Oka2IB?

I hearded that there is another product named HD-RX8 but price is 20$ :
http://ift.tt/28Rk4C1

This product seems to be more efficient than ANT-208, but I don't want to spend 30-35$ (cause I live in France and shipping is about 15$) if it doesn't work.

Does someone have installed HD-RX8 ? What's your feedback ? Better choice than this "garbage part" called ANT-208 ?

Is there another real solution to improve radio signal ? Like changing tuner, adding an hidden antenna ?

Thanks for your help !

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