I have upgraded my speakers to BLAUPUNKT BlueMagic TL130 at rear and TL160 at front. Both are 3 say coaxial from the BLUE MAGIC series. MY Linea is 2014 old look. And in just 6-7k the sound is entirely different and rich mostly due to the wonderful quality of BLUEMAGIC series from Blaupunkt. Added spacer rings. You can also do the CX130 at rear and CX160 at front from the BLUE MAGIC series both of which are component speakers. Should cost about 12k for both. But the 3 way coaxial are really good sounding speakers and get the best possible out of the stock FIAT HU which is from BLAUPUNKT at economical price.