Did consider loose connection / bad earth when sound dropped on sharp cornering. Will strip car at weekend and give it a wiggle on amp, n stuff. Might take out radio / CD head unit as well and see if there is anything obvious.
Fancy putting in a Avin type screen anyhow.
Seen this
https://www.aliexpress.com/item/3300...758c5109PiWW0w
but will hang fire till I resolve sound.