@andys can I ask what you used for the RCA output on your RCD330? I've had the same unit for a year but only just attempted adding an amp. I spliced a (cheap) line output convertor, but was met with horrendous alternator whine and hiss on the speakers. I would love to avoid upgrading the head unit!
Also, on the Carplay/Android side, mine crashes constantly. The whole unit freezes up while the audio is still playing. I have to pull the USB, reboot the unit and sometimes reboot my phone too. A massive pain, but I'm not convinced that spending 4x as much on Kenwood, Pioneer etc is going to make the whole experience seamless (going off YouTube and Amazon reviews) so I'm putting up with it
Also, on the Carplay/Android side, mine crashes constantly. The whole unit freezes up while the audio is still playing. I have to pull the USB, reboot the unit and sometimes reboot my phone too. A massive pain, but I'm not convinced that spending 4x as much on Kenwood, Pioneer etc is going to make the whole experience seamless (going off YouTube and Amazon reviews) so I'm putting up with it